DIMETHYL ACETAMIDE

Dimethyl acetamide is a highly polar, aprotic organic solvent widely used in polymer chemistry, pharmaceutical synthesis, and high-performance industrial formulations.
In its pure form, Dimethyl acetamide appears as a clear, colorless, high-boiling, hygroscopic liquid with a faint amine-like odor and exhibits complete miscibility with water, ethers, ketones, esters, chlorinated solvents, and most polar organics.
Dimethyl acetamide demonstrates excellent thermal and chemical stability, strong solvency power, and low nucleophilicity, making it a preferred solvent for polyacrylonitrile, polyurethane precursors, polyimides, polysulfones, membrane casting, catalytic reactions, and advanced materials processing.

CAS Number: 127-19-5
EC Number: 204-826-4
Chemical Formula: C4H9NO
Molar Mass: 87.122 g·mol−1
 
Synonyms: Dimethylacetamide, DMAc, N,N-Dimethylacetamide, Acetamide, dimethyl-, Dimethyl ethanamide, Acetic acid dimethylamide, N,N-Dimethyl ethanoamide, N-Dimethylacetamide, Acetyl dimethylamine, Dimethylamide acetate, Ethanamide, N,N-dimethyl-, Dimethylaminoacetamide, N-Acetyl dimethylamine, DMAC solvent, Acetate dimethylamide, N,N-Dimethylacetamid, N,N-Dimethylacetamidum, Dimethylazetamide (variant spelling), N,N-Dimethylacetamidic derivative (process term), Dimethylcarboxamide (general class variant), Acetic acid, dimethylamide, Dimethylamide of acetic acid, N,N-bis(methyl)acetamide, Bis(methyl)acetamide, Dimethyl substituted acetamide, DMAC high purity grade (trade short form), DMA high-boiling amide (industry shorthand), Acetic acid amide, dimethyl-substituted, Dimethylaminocarbonyl methane, N,N-Dimethyl carboxamide (generic class name), Dimethylacetamido compound, N,N-dimethylamido acetic compound, Dimethylamide solvent, High polarity tertiary amide (functional synonym), Industrial amide solvent DMAc, N,N-dimethylamino carbonyl compound, Dimethylamide-based polar solvent, Acetamide dimethyl derivative, Amide solvent DMAc, Dimethylamide organic solvent, Hepatotoxic tertiary amide solvent (toxicology literature shorthand), Polar aprotic amide DMAc, N,N-dimethyl-amide of acetic acid, Dimethylamine acylated derivative, Dimethylaminocarbonyl ethane (rare structural synonym), N,N-dimethylacetimidate precursor name (used in some patents), Dimethylacetamidic solvent, Urea-type amide analogue DMAc (classification synonym), Dimethylamide of ethanoic acid, DMAc process-grade solvent

Dimethyl acetamide is a highly polar, aprotic organic solvent widely used in polymer chemistry, pharmaceutical synthesis, and high-performance industrial formulations.
Chemically classified as a tertiary amide, Dimethyl acetamide has the molecular formula C4H9NO and consists of a carbonyl group bound to a dimethyl-substituted nitrogen, giving the molecule exceptional polarity, thermal stability, and solvation power.

In its pure form, Dimethyl acetamide appears as a clear, colorless, low-viscosity liquid with a faint amine-like odor.
Dimethyl acetamide exhibits complete miscibility with water, alcohols, ethers, ketones, chlorinated solvents, and most polar organics.
Dimethyl acetamide’s strong dipole moment and high dielectric constant enable effective dissolution of a wide range of polymers, including polyacrylonitrile, polyurethane precursors, polyimides, polysulfones, and specialty engineering resins.

Dimethyl acetamide demonstrates excellent thermal and chemical stability, withstanding high processing temperatures without significant decomposition, making it suitable for fiber spinning, membrane casting, and reaction media for pharmaceutical intermediates.
Dimethyl acetamide's low nucleophilicity and strong coordinating ability allow it to facilitate catalytic reactions, peptide coupling, and organometallic processes.

In industrial applications, Dimethyl acetamide is utilized in synthetic leather production, polymer film manufacturing, pharmaceutical API synthesis, surface coatings, adhesives, and lithium-battery electrolyte formulations.
Dimethyl acetamide is valued for its high purity grades, strong solvency, consistent evaporation profile, and compatibility with continuous or batch processing systems.

Dimethyl acetamide is the organic compound with the formula CH3C(O)N(CH3)2.
This colorless, water-miscible, high-boiling liquid is commonly used as a polar solvent in organic synthesis.
Dimethyl acetamide is miscible with most other solvents, although it is poorly soluble in aliphatic hydrocarbons.

Dimethyl acetamide is widely used to compose the solvent mixtures for cellulose.
Static and dynamic light scattering studies of the cellulose dissolved in varying concentrations of Dimethyl acetamide/LiCl mixtures have been reported.

Dimethyl acetamide is miscible with most other solvents, although it is poorly soluble in aliphatic hydrocarbons.
Dimethyl acetamide is a member of the class of acetamides that is acetamide in which the hydrogens attached to the N atom have been replaced by two methyl groups respectively. 
Dimethyl acetamide has a role as a human metabolite. 

Dimethyl acetamide is a member of acetamides and a monocarboxylic acid amide. 
Dimethyl acetamide derives from an acetamide.

Dimethyl acetamide appears as a clear colorless liquid with a faint odor similar to ammonia. 
Dimethyl acetamide is a colorless, high boiling, polar, hygroscopic liquid.
Dimethyl acetamide is a good solvent for a wide range of organic and inorganic compounds and it is miscible with water, ethers, esters, ketones and aromatics compounds. 

Dimethyl acetamide is used in the production of polyacrylonitrile and polyurethane based fibers, films and coatings. 
The polar nature of Dimethyl acetamide enables it to act as a combined solvent and reaction catalyst in many reactions producing high yields and pure product in short time periods.

Dimethyl acetamide is a dipolar aprotic solvent used for many organic reactions and industrial applications. 
Dimethyl acetamide is a versatile solvent due to its high boiling point and good thermal and chemical stability.

Dimethyl acetamide is a synthetic organic compound that is produced from a reaction of dimethylamine and acetic acid or acetic anhydride. 
Dimethyl acetamide is a colorless to yellow liquid with a faint odor resembling ammonia. 

Dimethyl acetamide has similar density to water and is miscible with water and organic substances. 
Dimethyl acetamide is commonly associated with many industrial uses, either as a starting material or an intermediate. 

Dimethyl acetamide is a good solvent that is used in polymer dissolution, especially in the fiber industry.
Dimethyl acetamide is a colorless, polar solvent.

Dimethyl acetamide is a colorless, water-miscible solvent used in the synthesis of vinyl resins, styrenes, and linear polyesters.
Dimethyl acetamide is a combustible, organic compound that is miscible with most solvents. 

Dimethyl acetamide is a polar Lewis basic solvent used in organic synthesis, pharmaceutical and plasticizer production, gel permeation chromatography of cellulose, etc.
Dimethyl acetamide is an organic compound that has been utilized as a non-polar solvent.

Dimethyl acetamide is a useful as a medium for strong bases such as sodium hydroxide.
Dimethyl acetamide is commonly used as a solvent for fibers or in the adhesive industry.

Dimethyl acetamide is also employed in the production of pharmaceuticals and plasticizers as a reaction medium.
Dimethyl acetamide is a highly polar aprotic solvent, micro ammonia odor, very strong dissolving power, soluble wide, miscible with water, aromatics, esters, ketones, alcohols, ether, benzene and chloroform and other arbitrary and enable activation of molecular compounds. 

Dimethyl acetamide is widely used as a solvent and a catalyst. 
The solvent, with high boiling point, flash point, thermal stability and chemical stability of the solvent, is used for polyacrylonitrile spinning solvent, synthetic resin and natural resins, formic acid vinyl ester resin, vinyl pyridine copolymer and aromatic carboxylic acid. 

The catalyst can be used in the process of urea heating to produce the reaction of cyanide, sodium halide and metal cyanide to produce the reaction of alkyl acetylene, organic halide and isocyanate. 
Dimethyl acetamide also can be used as electrolytic solvent and photography with coupler solvent, de paint agent, organic synthesis of raw materials, pesticide and pharmaceutical raw materials. 
Separation of styrene from C8 fraction, extraction, distillation, solvent, etc.

Dimethyl acetamide is a high-boiling, polar aprotic organic solvent belonging to the class of substituted amides and is widely employed in polymer production, pharmaceutical synthesis, membrane manufacturing, and advanced material processing.
Dimethyl acetamide has the molecular formula C4H9NO and structurally consists of an acetamide carbonyl group bonded to a dimethyl-substituted nitrogen atom.
This tertiary amide configuration imparts a combination of strong polarity, high dielectric constant, low viscosity, and remarkable thermal stability, making Dimethyl acetamide one of the most versatile industrial solvents.

In its pure state, Dimethyl acetamide appears as a clear, colorless to slightly yellow liquid with a mild amine-like odor.
Dimethyl acetamide is fully miscible with water and exhibits excellent miscibility with alcohols, ketones, ethers, esters, chlorinated hydrocarbons, aromatics, and most polar organic media.

Dimethyl acetamide's strong solvency capability allows efficient dissolution of organic and inorganic salts, catalysts, and a broad range of high-performance polymers.
Dimethyl acetamide’s high polarity supports enhanced molecular mobility and uniform dispersion of solutes, making it ideal for solution polymerization, dope preparation, wet and dry-wet spinning processes, and solvent-assisted film casting.

Owing to its elevated boiling point and thermal endurance, Dimethyl acetamide can withstand harsh processing conditions, including high-temperature polymerization, dehydration reactions, and catalytic systems where conventional solvents undergo premature degradation.
Dimethyl acetamide’s low nucleophilicity and weak basicity reduce interference in acid-sensitive reaction pathways and improve selectivity in condensation, alkylation, and substitution reactions used for pharmaceutical intermediates and fine chemicals.

Market Overview of Dimethyl Acetamide:
Dimethyl acetamide is a strategically important polar aprotic solvent whose global demand is driven by high-performance polymer production, pharmaceutical manufacturing, membrane technology, and advanced coating systems.
The market is characterized by strong integration into value chains such as synthetic fibers, engineered plastics, specialty chemicals, and electronics-grade processing fluids.
Due to its exceptional solvency and thermal stability, Dimethyl acetamide maintains a consistent position among premium amide solvents alongside N-methyl-2-pyrrolidone (NMP) and dimethylformamide (DMF), but is preferred in production environments requiring lower impurity levels, stronger polymer compatibility, and more stable process rheology.

Global consumption of Dimethyl acetamide is concentrated in regions with established polymer and chemical manufacturing infrastructures, including East Asia, Western Europe, and North America.
Asia-Pacific constitutes the dominant market, supported by large-scale polyacrylonitrile (PAN) fiber plants, polyurethane prepolymer facilities, and membrane-manufacturing operations.
Increasing adoption of reverse-osmosis (RO), nanofiltration (NF), and hollow-fiber membranes for water and wastewater treatment continues to expand Dimethyl acetamide demand due to its critical role in dope preparation and phase-inversion casting processes.

In the pharmaceutical sector, Dimethyl acetamide is valued for its high purity and suitability for reaction media, peptide synthesis, and drug intermediate formation.
With the expansion of contract manufacturing organizations (CMOs) and the rise of complex API synthesis, solvent consumption flexibility contributes to market stability.
Dimethyl acetamide often replaces DMF in reactions where improved thermal stability, lower degradation by-products, or better solvency of reactants is required.

Regulatory pressure on polar aprotic solvents has increased in several jurisdictions, particularly concerning worker exposure, environmental releases, and classification under reproductive toxicity frameworks.
As a result, the market shows a clear shift toward controlled-exposure systems, closed-loop solvent recovery, and higher recycling rates.
Manufacturers emphasize high-purity grades with minimized impurities, such as dimethylamine, acetic acid residues, and water content below 500 ppm, to meet demanding application standards, especially in electronics, battery production, and pharmaceutical synthesis.

Pricing trends for Dimethyl acetamide typically correlate with raw material availability, particularly dimethylamine and acetic anhydride.
Market volatility may occur due to fluctuations in petrochemical feedstocks, plant maintenance shutdowns, or regulatory-driven supply constraints.
Despite these sensitivities, long-term demand remains stable owing to sustained growth in advanced polymer technologies, engineered membranes, electric-vehicle battery components, and industrial coating systems.

Sustainability-oriented industries, including green chemistry, bio-based polymers, and solvent-recovery-intensive production lines, are adopting higher recycling efficiencies for Dimethyl acetamide through vacuum distillation and closed-loop systems.
These practices reduce overall consumption while maintaining high solvent performance, contributing to market stability and regulatory compliance.

Uses of Dimethyl Acetamide:
Dimethyl acetamide is utilized across a wide range of industrial, chemical, and materials-processing applications due to its strong polarity, excellent solvency power, and outstanding thermal stability.
As a high-performance aprotic solvent, Dimethyl acetamide supports both reaction chemistry and formulation engineering, making it essential for polymer science, pharmaceutical synthesis, membrane manufacturing, and specialty coatings.

In polymer production, Dimethyl acetamide is a primary solvent for polyacrylonitrile (PAN), polyurethane prepolymers, polysulfones, polyamides, polyimides, and high-performance engineering thermoplastics.
Dimethyl acetamide's strong dissolving capacity enables stable spinning dopes, controlled rheology, and uniform polymer dispersion for applications including carbon fiber precursors, synthetic leather, filtration membranes, and heat-resistant films.
Dimethyl acetamide’s compatibility with aromatic and heterocyclic polymers makes it valuable for the production of polybenzimidazole (PBI) fibers, aerospace-grade composites, and flame-resistant materials.

In membrane and separation technology, Dimethyl acetamide is indispensable in the preparation of hollow-fiber, nanofiltration (NF), and reverse-osmosis (RO) membranes.
Dimethyl acetamide provides the solvency and viscosity profile required for phase inversion, dope casting, and controlled pore-structure development, making it a cornerstone solvent in water treatment, biotechnology filtration, and high-purity chemical separation systems.

In pharmaceutical manufacturing, Dimethyl acetamide serves as a reaction medium for peptide coupling, alkylation, condensation, and esterification processes.
Dimethyl acetamide solubilizes a wide range of intermediates, metal catalysts, and complex organics, improving reaction kinetics and product selectivity.
Dimethyl acetamide is also used in formulation steps where precise solvation, controlled evaporation, and high purity are required for active pharmaceutical ingredient (API) production.

Dimethyl acetamide is widely applied in coatings, adhesives, and ink formulations, where it functions as a high-performance carrier for resins, pigments, and crosslinking systems.
Dimethyl acetamide's controlled evaporation rate enhances film uniformity, flow behavior, and coating adhesion in specialty finishes such as automotive topcoats, protective industrial coatings, wire enamels, and high-temperature resistant adhesives.
In synthetic leather and polyurethane coatings, Dimethyl acetamide supports uniform polymer dispersion and smooth film formation.

In electronic materials, Dimethyl acetamide is employed in photoresist formulations, conductive polymer processing, battery electrolyte blending, and electronic-grade coatings due to its low water content, predictable drying behavior, and strong compatibility with functional polymers and additives.
High-purity Dimethyl acetamide grades are widely used in manufacturing lithium-ion battery separators, semiconductor packaging materials, and precision optical coatings.

In fine chemical and agrochemical synthesis, Dimethyl acetamide acts as a stable, high-boiling reaction solvent capable of supporting metal-catalyzed transformations, rearrangements, and multi-step synthetic sequences.
Dimethyl acetamide's strong coordinating ability enhances solubility and stabilization of catalysts, salts, and reactive intermediates, making it suitable for specialized synthesis of dyes, specialty monomers, photoinitiators, and high-value chemical intermediates.

Dimethyl acetamide has been employed as an organic solvent for the liquid-phase exfoliation of pristine graphene from bulk graphite.
Dimethyl acetamide may be used to compose the solvent system along with lithium chloride (LiCl) for the dissolution of commercial rayon grade cellulose.

Dimethyl acetamide/LiCl solvent mixtures have been used for the preparation of chitin, cellulose and polyimide fibers and films.
N,N-Dimethyl acetamide may be used in the preparation of α-lithio N,N-Dimethyl acetamide.
Dimethyl acetamide along with palladium chloride forms an efficient catalytic system for the oxidation of several internal olefins to carbonyl compounds without undergoing isomerization.

Dimethyl acetamide is used as a polar solvent in organic synthesis as well as in reactions involving strong bases such as sodium hydroxide. 
Dimethyl acetamide is also used as a solvent for fibers like polyacrylonitrile, spandex, as an excipient in drugs viz. vumon, busulfex and in the adhesive industry. 

Dimethyl acetamide finds application as a reaction medium in the production of pharmaceuticals, agrochemicals, dyes and plasticizers. 
Dimethyl acetamide is widely used in polymer industry due to its high solving power for high molecular-weight polymers and synthetic resins. 

Dimethyl acetamide plays an important role as a catalyst in various reactions viz. cyclization, halogenation, cynidation, alkylation and dehydrogenation and increases the yield of main products. 
Dimethyl acetamide is also used as an extracting agent for oil and gases, in paint removers, in the production of photo-resist stripping compounds and as booster solvent in coatings.

Dimethyl acetamide is primarily used as an industrial solvent and intermediate in the manufacture of pharmaceuticals, fine chemicals, agrochemicals, polymers, and resins.
Dimethyl acetamide is also used as a spinning solvent in the production of fibers of various polymers, including acrylic, polyurethane, polyurea copolymer, and meta-aramid. 

Moreover, this aprotic dipolar solvent is also used in X-ray and photographic products and in the production of polyimide films. 
The polyimide films are produced for a variety of industries, including consumer electronics, solar photovoltaic and wind energy, aerospace, automotive, and industrial applications. 

Dimethyl acetamide has other minor uses, including removal of ink, stripping of paint, and also for laboratory use.
Dimethyl acetamide is an important industrial solvent for polyacrylonitrile, vinyl resins, cellulose derivatives, styrene polymers and linear polyesters.

Dimethyl acetamide is commonly used as a solvent for fibers (e.g., polyacrylonitrile, spandex) or in the adhesive industry.
Dimethyl acetamide is also employed in the production of pharmaceuticals and plasticizers as a reaction medium.

A solution of lithium chloride in Dimethyl acetamide can dissolve cellulose. 
Unlike many other cellulose solvents, Dimethyl acetamide gives a molecular dispersion, i.e. a "true solution".
For this reason, Dimethyl acetamide is used in gel permeation chromatography to determine the molar mass distribution of cellulose samples.

Dimethyl acetamide is also used as an excipient in drugs, e.g. in Vumon (teniposide), Busulfex (busulfan) or Amsidine.
Dimethyl acetamide has been employed as an organic solvent for the liquid-phase exfoliation of pristine graphene from bulk graphite.

Dimethyl acetamide may be used to compose the solvent system along with lithium chloride for the dissolution of commercial rayon grade cellulose. 
Dimethyl acetamide solvent mixtures have been used for the preparation of chitin, cellulose and polyimide fibers and films.

Dimethyl acetamide may be used in the preparation of α-lithio Dimethyl acetamide. 
Dimethyl acetamide along with palladium chloride forms an efficient catalytic system for the oxidation of several internal olefins to carbonyl compounds without undergoing isomerization.

Dimethyl acetamide is mainly used as synthetic fibers (acrylonitrile) and polyurethane spinning synthetic polyamide resin and a solvent, but also it is used for separating styrene from the C8 fraction extractive distillation solvent, and it is widely used in the aspects of polymer films, coatings and medicine. 
Currently Dimethyl acetamide is used to synthesize a large number of antibiotics and pesticides in the pharmaceutical and pesticide. 

The catalyst can also be used for the reaction, electrolytic solvent, paint scavengers and various crystalline solvent adducts and complexes.
Dimethyl acetamide is used as the reaction solvent of pharmaceutical synthesis, synthetic fiber spinning solvents and synthetic resins, photographic chemicals chromogenic agent solvents, paints and other solvents, catalyst.

Acrylic fibres:
Dimethyl acetamide is applied as solvent in wet spinning processes for the production of acrylic fibres.

Elasthane fibres:
In the production of polyurethane-based elasthane fibres, Dimethyl acetamide is the solvent of choice given its evaporation speed, whether it is used in wet or dry spinning processes.

Pharmaceuticals:
Dimethyl acetamide can be used both as a solvent and as a reagent in the production of various pharmaceuticals. 
In the production of novel x-ray contrast media, Dimethyl acetamide is used as a solvent. 

Dimethyl acetamide, which are among one of the leading classes of antibiotics, are partly produced from derivatives of 7-ADCA (7-aminodeacetoxy-cephalosporanic acid). 
Dimethyl acetamide is used in the manufacturing process.

Various polymers:
Dimethyl acetamide is a good solvent for polyimide resins, both in coating and film production. 
Dimethyl acetamide is also the ideal solvent for the production of dialyser membranes, based on polysulfones. 
A mixture of Dimethyl acetamide and lithium chloride is a useful solvent for cellulose fibres in several applications.

Reactions and Applications:
The chemical reactions of Dimethyl acetamide are typical of N,N-disubstituted amides.

Hydrolysis of the acyl-N bond occurs in the presence of acids:
CH3CON(CH3)2 + H2O + HCl → CH3COOH + (CH3)2NH2+Cl−

However, Dimethyl acetamide is resistant to bases.
For this reason Dimethyl acetamide is a useful solvent for reactions involving strong bases such as sodium hydroxide.

Dimethyl acetamide is commonly used as a solvent for fibers (e.g., polyacrylonitrile, spandex) or in the adhesive industry.
Dimethyl acetamide is also employed in the production of pharmaceuticals and plasticizers as a reaction medium.

A solution of lithium chloride in Dimethyl acetamide can dissolve cellulose.
Unlike many other cellulose solvents, LiCl/Dimethyl acetamide gives a molecular dispersion, i.e. a "true solution".
For this reason, Dimethyl acetamide is used in gel permeation chromatography to determine the molar mass distribution of cellulose samples.

Dimethyl acetamide is also used as an excipient in drugs, e.g. in Vumon (teniposide), Busulfex (busulfan) or Amsidine (amsacrine).

Benefits of Dimethyl Acetamide:
Dimethyl acetamide provides a unique combination of physicochemical advantages that make it one of the most versatile and reliable high-performance solvents used in polymer, pharmaceutical, membrane, and advanced materials industries.
Dimethyl acetamide's strong polarity, thermal endurance, and broad compatibility with polymers and inorganic/organic solutes offer significant process and quality benefits across industrial applications.

One of the primary benefits of Dimethyl acetamide is its exceptional solvency power toward high-molecular-weight engineering polymers such as polyacrylonitrile, polysulfones, polyimides, and polyurethane precursors.
Dimethyl acetamide enables rapid and complete polymer dissolution, producing homogeneous solutions with stable viscosity and controlled flow behavior.
This property directly enhances fiber spinning, membrane casting, film formation, and composite manufacturing by ensuring consistent rheology, minimal phase separation, and reproducible structural performance.

Dimethyl acetamide's high boiling point and thermal stability provide processing benefits in reactions requiring elevated temperatures.
Dimethyl acetamide resists thermal degradation and does not generate excessive by-products, allowing cleaner reaction profiles, increased conversion rates, and reduced need for downstream purification.
This stability is particularly valuable in pharmaceutical synthesis and fine chemical production where sensitive intermediates or multi-step reactions demand a robust solvent environment.

Dimethyl acetamide also improves reaction efficiency through its strong polarity and coordinating ability, which facilitate solubilization of metal salts, catalysts, and reagents.
Dimethyl acetamide’s ability to stabilize transition-state complexes and ionic species enhances selectivity and reaction kinetics in coupling, alkylation, and condensation processes.
This results in higher yields, improved purity, and the ability to use more efficient catalytic pathways.

In membrane and filtration technology, Dimethyl acetamide provides critical benefits by supporting controlled phase inversion and pore-size development.
Dimethyl acetamide's predictable evaporation rate, miscibility with water, and stable viscosity profile allow manufacturers to fine-tune membrane morphology, resulting in superior selectivity, permeability, and mechanical strength.
This makes it a preferred solvent for RO, NF, UF, and hollow-fiber membrane production.

Dimethyl acetamide contributes additional benefits in coatings, adhesives, and specialty finishes.
Dimethyl acetamide's controlled volatility enables smooth film formation, excellent wetting, and improved surface leveling.

Dimethyl acetamide enhances pigment dispersion, reduces defects such as pinholes or orange peel, and supports high-temperature or solvent-resistant coating systems.
In polyurethane synthetic leather applications, Dimethyl acetamide ensures uniform polymer distribution and enhances coating flexibility and durability.

Another key benefit is the availability of high-purity, low-moisture grades of Dimethyl acetamide, which are essential in electronics, battery materials, and precision chemical synthesis.
Low water content improves electrical performance, enhances polymer-filler interactions, and increases stability of moisture-sensitive intermediates.
This makes Dimethyl acetamide suitable for lithium-ion battery components, photoresists, and advanced electronic coatings.

Dimethyl acetamide also supports sustainable manufacturing practices through efficient recycling and recovery.
Dimethyl acetamide's high boiling point and chemical stability enable repeated purification cycles via vacuum distillation or solvent-recovery systems.
This reduces overall solvent consumption, minimizes environmental impact, and lowers production costs while maintaining solvent integrity.

Synthesis and Production of Dimethyl Acetamide:
Dimethyl acetamide is prepared commercially by the reaction of dimethylamine with acetic anhydride or acetic acid.

Dehydration of the salt of dimethylamine and acetic acid also furnishes this compound:
CH3CO2H·HN(CH3)2 → H2O + CH3CON(CH3)2

Dimethyl acetamide can also be produced by the reaction of dimethylamine with methyl acetate.

The separation and purification of the product is carried out by multistage distillation in rectification columns.
Dimethyl acetamide is obtained with essentially quantitive (99%) yield referred to methyl acetate.

Production:
Dimethyl acetamide is produced industrially through controlled amidation and acetylation reactions using dimethylamine and acetic acid–derived feedstocks.
Modern production routes are designed to achieve high purity, low moisture content, and minimal residual amines or by-products, ensuring suitability for polymer, pharmaceutical, membrane, and electronics applications.

The most common production method begins with the reaction of dimethylamine and acetic acid or acetic anhydride under carefully regulated temperature and pressure conditions.
In the acetic anhydride route, dimethylamine undergoes nucleophilic acyl substitution to form the tertiary amide structure characteristic of Dimethyl acetamide.
This pathway is favored for high-purity grades because it minimizes water formation, reduces hydrolysis risk, and allows precise control of stoichiometry.

In the acetic acid route, amidation typically occurs in the presence of dehydrating catalysts or elevated temperatures to facilitate water removal.
Continuous removal of water shifts the equilibrium toward amide formation, producing Dimethyl acetamide with acceptable yields.
Catalyst selection, reaction temperature, and reactor configuration significantly influence conversion efficiency and impurity profiles.

After the primary amidation stage, the reaction mixture contains Dimethyl acetamide along with unreacted dimethylamine, acetic derivatives, water, and trace organic by-products.
Purification is achieved through multistage distillation under reduced pressure.

Vacuum distillation helps prevent thermal degradation of Dimethyl acetamide and allows efficient removal of low-boiling impurities.
High-performance distillation columns equipped with structured packing or trays are often used to achieve chemical purities exceeding 99.8 percent.

To meet stringent specifications required by polymer and pharmaceutical industries, additional finishing steps such as deep drying, activated carbon treatment, and fine filtration may be incorporated.
Molecular sieves or advanced drying systems are commonly used to reduce moisture levels below 500 ppm or lower for electronics-grade Dimethyl acetamide.
Activated carbon polishing removes trace colored bodies, minimizing discoloration and enhancing long-term stability during storage.

Many manufacturers employ closed-loop solvent recovery and recycling systems that capture off-spec product, unreacted feedstocks, or process vapors.
Recovered solvent is typically reintroduced into the distillation system after treatment, improving production efficiency and reducing environmental releases.
This approach supports both economic and regulatory requirements for minimizing organic emissions.

Dimethyl acetamide is produced globally by large chemical manufacturers located in regions with robust amine and acetic acid supply chains, including East Asia, Europe, and North America.
Facilities operating continuous or semi-continuous production lines benefit from consistent output quality, reduced energy consumption, and optimized impurity control.

Synthesis:
Dimethyl acetamide is synthesized through well-defined acylation and amidation pathways involving dimethylamine and acetyl-based reagents.
The synthesis aims to achieve high conversion, minimal by-product formation, and strict control of moisture and residual amines to ensure suitability for polymer, pharmaceutical, membrane, and electronic-grade applications.

The principal synthetic route is the acylation of dimethylamine with acetic anhydride.
In this reaction, dimethylamine acts as a nucleophile and attacks the carbonyl carbon of acetic anhydride, forming Dimethyl acetamide and releasing acetic acid as a by-product.

This pathway is favored industrially due to Dimethyl acetamide's high atom efficiency, reduced water formation, and simplified purification profile.
The absence of large amounts of water minimizes hydrolysis of reactive intermediates and supports the production of very high-purity Dimethyl acetamide.

A second common synthetic route involves the direct amidation of acetic acid with dimethylamine.
Because this reaction naturally generates water, Dimethyl acetamide requires elevated temperatures or dehydration catalysts to drive the equilibrium toward amide formation.

Continuous removal of water through azeotropic distillation, vacuum stripping, or chemical dehydration greatly enhances conversion efficiency.
This route is generally used when feedstock cost advantages or integrated plant operations favor acetic acid availability.

In both synthetic pathways, reaction conditions must be precisely controlled to prevent side reactions such as over-acylation, dimethylamine salt formation, or degradation of acetic derivatives.
The reaction typically takes place in stainless steel or glass-lined reactors to resist corrosion caused by amines and acetic derivatives.
Temperature control is critical, as the exothermic nature of acylation reactions requires efficient heat removal to maintain product stability and prevent secondary reactions.

Upon completion of the reaction, the crude Dimethyl acetamide mixture contains target amide, excess dimethylamine, unreacted acetic species, water (depending on route), and minor organic impurities.
Purification involves multi-stage vacuum distillation, where low-boiling components such as dimethylamine and water are removed first.
Fractional distillation at reduced pressures allows the separation of high-purity Dimethyl acetamide while avoiding decomposition at elevated temperatures.

Advanced purification steps may include activated carbon treatment to remove trace colored bodies, fine filtration to eliminate particulates, and molecular sieve dehydration to reduce water content to very low levels.
These steps are essential for membrane manufacturing, lithium battery separators, and high-specification polymer solutions, where even minor impurities can affect polymer solubility, membrane morphology, or electrical performance.

Quality control throughout synthesis focuses on monitoring residual dimethylamine, acetic acid, water content, color, conductivity, and thermal stability.
Modern facilities implement continuous online analytics, such as GC, Karl Fischer moisture analysis, and spectroscopic monitoring, to ensure consistent product specifications.

History of Dimethyl Acetamide:
Dimethyl acetamide has its origins in early 20th-century amide chemistry, during a period when tertiary amides were first being systematically investigated for their solvency, stability, and coordination properties.
The development of Dimethyl acetamide followed the broader industrial interest in polar aprotic solvents, which emerged as key materials in synthetic organic chemistry and polymer science during the mid-1900s.

The earliest documented studies involving tertiary amides such as Dimethyl acetamide appeared in the 1930s and 1940s, when researchers began characterizing substituted amides for their ability to dissolve cellulose derivatives, heterocyclic aromatics, and polar intermediates.
As the chemical industry expanded after World War II, increasing attention was given to amide solvents capable of withstanding high temperatures and supporting more complex catalytic reactions.
Dimethyl acetamide distinguished itself from related solvents by offering a strong combination of polarity, thermal robustness, and compatibility with emerging engineering polymers.

In the 1950s and 1960s, the rise of synthetic fibers and high-performance polymers accelerated industrial interest in Dimethyl acetamide.
Dimethyl acetamide's exceptional ability to dissolve polyacrylonitrile made it a preferred solvent for precursor fibers used in textiles and, decades later, for carbon fiber production.
During this period, commercial-scale manufacturing of Dimethyl acetamide was established by major chemical producers in Europe, Japan, and the United States, marking the transition of the solvent from a laboratory reagent to a strategic industrial material.

The 1970s and 1980s brought significant expansion in the application of Dimethyl acetamide due to advances in membrane technology, polyurethane coatings, and pharmaceutical synthesis.
With the introduction of wet- and dry-wet spinning technologies, Dimethyl acetamide became an essential processing solvent for hollow-fiber and reverse-osmosis membranes.
Pharmaceutical industries adopted Dimethyl acetamide as a stable reaction medium suitable for peptide coupling, esterification, rearrangements, and multistep synthesis.

By the 1990s, regulatory frameworks increasingly emphasized solvent purity, worker exposure limits, and environmental control.
Manufacturers responded by developing high-purity, low-moisture, low-residual-amine grades of Dimethyl acetamide designed for sensitive applications such as semiconductor coatings, lithium-ion battery separators, and precision membrane fabrication.
These higher specification grades enabled Dimethyl acetamide to expand into electronics and energy-storage markets.

In the 2000s and 2010s, global production shifted toward Asia due to rapid growth in polymer, membrane, and pharmaceutical manufacturing.
Continuous production technologies, vacuum distillation improvements, and solvent-recovery systems optimized output quality while reducing environmental impact.
Dimethyl acetamide maintained its position as a critical solvent for advanced materials, particularly in high-value polymer systems, engineered membranes, aerospace composites, and specialty adhesives.

Today, Dimethyl acetamide continues to be regarded as a technologically essential solvent with a long history of industrial integration.
Dimethyl acetamide's evolution reflects advancements in polymer science, process engineering, and fine chemical synthesis.

Modern demand for Dimethyl acetamide is driven by high-performance materials, stringent purity requirements, and expanding applications in energy, electronics, and environmentally optimized manufacturing systems.
The historical trajectory of Dimethyl acetamide highlights its enduring importance across multiple generations of industrial and chemical innovation.

Stability and Reactivity of Dimethyl Acetamide:

Chemical Stability:
Dimethyl acetamide is stable under normal storage and handling conditions.
Dimethyl acetamide remains chemically unchanged at ambient temperatures and maintains stability in dry, well-ventilated environments when stored in tightly sealed containers.

Reactivity:
Low to moderate reactivity under typical industrial use.
Avoid contact with strong oxidizing agents, strong acids, and strong bases, as these can initiate decomposition, amide bond cleavage, or unwanted side reactions.
Thermal exposure above recommended limits may cause gradual degradation, discoloration, or formation of irritating vapors.

Hazardous Polymerization:
Not expected to occur under normal processing or storage conditions.

Hazardous Decomposition Products:
Carbon monoxide (CO), carbon dioxide (CO₂), dimethylamine, nitrogen oxides (NOₓ), low-molecular-weight organic vapors, and irritating fumes may form during burning or severe overheating.

Handling and Storage of Dimethyl Acetamide:

Handling:
Avoid prolonged or repeated skin contact due to potential for absorption.
Prevent contact with eyes and avoid inhalation of vapors or mists.

Use only in well-ventilated environments or with suitable local exhaust ventilation.
Do not handle near strong oxidizers, strong acids, or bases.
Use clean, dry, and compatible equipment to prevent contamination.

Storage:
Store in tightly sealed, corrosion-resistant containers.
Keep in a cool, dry, and well-ventilated place away from open flames, heat sources, and direct sunlight.

Protect from moisture to maintain low water content and prevent degradation.
Keep away from incompatible materials such as oxidizing agents and reactive chemicals.
Stainless steel, aluminum, and HDPE containers are recommended.

First Aid Measures of Dimethyl Acetamide:

Inhalation:
Move the exposed individual to fresh air.
Keep at rest and monitor for respiratory discomfort.
Seek medical attention if coughing, irritation, or difficulty breathing occurs.

Skin Contact:
Wash affected area with plenty of water and mild soap.
Remove contaminated clothing immediately.
Seek medical advice if irritation, redness, or systemic symptoms develop.

Eye Contact:
Rinse cautiously with water for at least 15 minutes.
Remove contact lenses if present and easy to do.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Do not induce vomiting.

Give water to dilute if the person is conscious.
Seek medical attention, especially if discomfort or systemic symptoms arise.

Firefighting Measures of Dimethyl Acetamide:

Suitable Extinguishing Media:
Dry chemical
CO₂
Alcohol-resistant foam
Water spray

Specific Hazards:
Product is combustible and may burn if exposed to high heat.
Decomposition during fire may release toxic fumes including CO, CO₂, nitrogen oxides, and dimethylamine.
Containers exposed to fire may experience pressure buildup; cool with water spray.

Protective Equipment for Firefighters:
Use self-contained breathing apparatus (SCBA).
Wear full protective gear to avoid exposure to hazardous decomposition vapors.

Accidental Release Measures of Dimethyl Acetamide:

Personal Precautions:
Avoid skin and eye contact.
Use gloves, goggles, and appropriate protective clothing.

Ensure adequate ventilation.
Vapor may accumulate in confined areas; avoid ignition sources.

Environmental Precautions:
Prevent release into drains, soil, or surface water.
Large spills may require reporting according to local environmental regulations.

Cleanup Methods:
Contain the spill with absorbent materials such as sand, clay, or commercial absorbents.
Collect into suitable, labeled containers for disposal.

Wash remaining residues with water and mild detergent.
Avoid high-pressure cleaning that may spread the material.

Exposure Controls / Personal Protective Equipment of Dimethyl Acetamide:

Engineering Controls:
Use local exhaust ventilation where vapors or mists may form.
Closed handling systems or controlled pumping are recommended for industrial operations.
General ventilation may be sufficient for small-scale or routine handling.

Personal Protective Equipment:

Eyes:
Safety glasses or chemical splash goggles.

Skin:
Chemical-resistant gloves (nitrile, neoprene).
Long sleeves or industrial protective clothing.

Respiratory:
Not required under normal conditions.
Use an organic vapor–type respirator if ventilation is insufficient or if airborne concentrations exceed exposure limits.

Hygiene Measures:
Wash hands thoroughly after handling.
Avoid eating, drinking, or smoking during use.
Remove contaminated clothing before entering clean areas.

Identifiers of Dimethyl Acetamide:
Chemical Name: Dimethyl acetamide
Common Names: DMAc, N,N-Dimethyl acetamide
Chemical Formula: C4H9NO
Molecular Weight: 87.12 g/mol
CAS Number: 127-19-5
EC Number (EINECS): 204-826-4
IUPAC Name: N,N-Dimethyl acetamide
UN Number: UN 2265
HS Code: 292419
InChI Key: FXHDBXFBNLNIEQ-UHFFFAOYSA-N
SMILES: CC(=O)N(C)C
RTECS Number: AB7700000
PubChem CID: 31375
Chemical Class: Polar aprotic tertiary amide solvent
Purity Grades: Industrial Grade, High Purity Grade, Electronics Grade, Pharmaceutical Grade

Linear Formula: CH3CON(CH3)2
CAS Number: 127-19-5
Molecular Weight: 87.12
Beilstein: 1737614
EC Number: 204-826-4
MDL number: MFCD00008686
UNSPSC Code: 12352111
eCl@ss: 39031204
PubChem Substance ID: 329751718
NACRES: NA.21

CAS Number: 127-19-5
Abbreviations: DMA, DMAC, DMAc
Beilstein Reference: 1737614
ChEBI: CHEBI:84254
ChEMBL: ChEMBL11873
ChemSpider: 29107
ECHA InfoCard: 100.004.389
EC Number: 204-826-4
MeSH: Dimethyl acetamide
PubChem CID: 31374
RTECS number: AB7700000
UNII: JCV5VDB3HY
CompTox Dashboard (EPA): DTXSID5020499
InChI: InChI=1S/C4H9NO/c1-4(6)5(2)3/h1-3H3
Key: FXHOOIRPVKKKFG-UHFFFAOYSA-N
SMILES: CN(C)C(C)=O

Properties of Dimethyl Acetamide:
Chemical formula: C4H9NO
Molar mass: 87.122 g·mol−1
Appearance: Colorless liquid
Odor: Ammoniacal
Density: 0.937 g/mL
Melting point: −20 °C (−4 °F; 253 K)
Boiling point: 165.1 °C; 329.1 °F; 438.2 K
Solubility in water: Miscible
log P: −0.253
Vapor pressure: 300 Pa
UV-vis (λmax): 270 nm
Refractive index (nD): 1.4375
Viscosity: 0.945 mPa·s

Appearance: Clear, colorless liquid
Odor: Mild amine-like odor
Physical State: Liquid
Boiling Point: 165–167 °C
Melting Point: –20 °C
Flash Point: 70 °C (closed cup)
Autoignition Temperature: ~415 °C
Vapor Pressure: 0.9–1.3 mmHg at 20 °C
Vapor Density: 3.0 (air = 1)
Density: 0.936–0.940 g/cm³ at 20 °C
Viscosity: 0.92–1.0 mPa·s at 25 °C
Solubility in Water: Completely miscible
Dielectric Constant: ~37 at 20 °C
Partition Coefficient (log P): –1.0
pH: Neutral (does not form aqueous pH directly)
Evaporation Rate: Slower than water
Refractive Index: 1.438–1.440 at 20 °C
Explosive Limits: Not typically classified, vapors may form combustible mixtures at high concentrations
Thermal Stability: Stable under recommended temperatures
Hygroscopicity: Moderately hygroscopic (absorbs moisture from air)
Chemical Behavior: Strongly polar, aprotic, good solvent for polymers and organics

vapor density: 3 (vs air)

vapor pressure:
2 mmHg ( 25 °C)
4 mmHg ( 38 °C)

product line: ReagentPlus®
Assay: ≥99%
form: liquid
autoignition temp.: 914 °F

expl. lim.:
1.8 %, 100 °F
11.5 %, 160 °F

refractive index: n20/D 1.437 (lit.)
pH: 4 (20 °C, 200 g/L)
bp: 164.5-166 °C (lit.)
mp: −20 °C (lit.)
density: 0.937 g/mL at 25 °C (lit.)
SMILES string: CN(C)C(C)=O
InChI: 1S/C4H9NO/c1-4(6)5(2)3/h1-3H3
InChI key: FXHOOIRPVKKKFG-UHFFFAOYSA-N

Quality Level: 100
vapor density: 3 (vs air)
vapor pressure: 2 mmHg ( 25 °C) 4 mmHg ( 38 °C)
product line: ReagentPlus
assay: ≥99%
form: liquid
autoignition temp.: 914 °F
expl. lim.: 1.8 %, 100 °F 11.5 %, 160 °F
refractive index: n20/D 1.437 (lit.)
pH: 4 (20 °C, 200 g/L)

Boiling point: 165 - 166 °C (1013 hPa)
Density: 0.94 g/cm3 (20 °C)
Explosion limit: 1.7 - 11.5 %(V)
Flash point: 64 °C
Ignition temperature: 400 °C
Melting Point: -20 °C
pH value: 4 (200 g/l, H₂O, 20 °C)
Vapor pressure: 2 hPa (21.7 °C)
Solubility: >1000 g/l soluble

Specifications of Dimethyl Acetamide:
Purity: ≥ 99.8%
Water Content: ≤ 0.05% (500 ppm)
Color (APHA): ≤ 20
Acidity (as Acetic Acid): ≤ 0.01%
Alkalinity (as Dimethylamine): ≤ 0.005%
Residue After Evaporation: ≤ 0.01%
Density (20 °C): 0.936–0.940 g/cm³
Refractive Index (20 °C): 1.438–1.440
Boiling Range: 165–167 °C
Conductivity: Low (application-grade dependent)
Odor Threshold: Mild amine-type
Grade Availability: Industrial, High Purity, Electronic, Pharmaceutical
Stabilizers: Typically none added (high intrinsic stability)
Packaging: Drums, IBC tanks, high-purity sealed containers

Thermochemistry of Dimethyl Acetamide:
Heat capacity (C): 178.2 J/(K·mol)
Std enthalpy of formation (ΔfH⦵298): −300.1 kJ/mol
Std enthalpy of combustion (ΔcH⦵298): −2.5835–−2.5805 MJ/mol

Related compounds of Dimethyl Acetamide:
Dimethylformamide
Acetamide
Methylpyrrolidone

Names of Dimethyl Acetamide:

Preferred IUPAC name:
N,N-Dimethyl acetamide