PRODUCTS

MALEIC ACID DIOCTYL ESTER

Maleic acid dioctyl ester is a specialty ester obtained by the esterification of maleic acid with 2-ethylhexanol, typically supplied as a clear, colorless to pale yellow liquid with a mild characteristic odor and low volatility.
Maleic acid dioctyl ester is most widely recognized as a high-performance plasticizer and reactive monomer, valued for its ability to impart flexibility, softness, and low-temperature durability to a variety of polymer systems including PVC, vinyl acetate copolymers, and acrylates.
Beyond plasticization, Maleic acid dioctyl ester's reactive double bond enables use as a comonomer in specialty polymer synthesis, improving adhesion, film-forming ability, and surface properties in coatings, adhesives, and sealants.

CAS Number: 142-16-5
EC Number: 205-524-5
Molecular Formula: C20H36O4
Molecular Weight: 340.5

Synonyms: 2-Butenedioic acid (Z)-, bis(2-ethylhexyl) ester, Maleic acid, bis(2-ethylhexyl) ester, Bis-(2-ethylhexyl)ester kyseliny maleinove, Di-(2-ethylhexyl)maleate, DOM, RC Comonomer DOM, Bis(2-ethylhexyl) (2Z)-2-butenedioate, 2-Butenedioic acid (Z), di-2-ethylhexyl ester, 2-Butenedioic acid (2Z)-, 1,4-bis(2-ethylhexyl) ester, 2-Butenedioic acid (2Z)-, bis(2-ethylhexyl) ester, DOM, DICAPRYLYL MALEATE, DIETHYLHEXYL MALEATE, WS4, PCWH, WS2E, WS4C, α-Bulnesene, rccomonomerdom, Rc comonomer dom, Bis(2-ethylhexyl) (2Z)-2-butenedioate, bis(2-ethylhexyl)-2butenedioate , bis(2-ethylhexyl)-2-butenedioate , Bis-(2-ethylhexyl)ester kyseliny maleinove, bis-(2-ethylhexyl)esterkyselinymaleinove , di(2-ethvlhexvl)maleate , Rc comonomer dom, rccomonomerdom, Bis(2-ethylhexyl) (2Z)-but-2-enedioate, Bis(2-ethylhexyl) maleate, Di-2-ethylhexyl maleate, Diethylhexyl maleate, DOM, "Dioctyl" maleate, 2-Butenedioic acid (Z)-, bis(2-ethylhexyl) ester, Bis(2-ethylhexyl) maleate, Bis(2-ethylhexyl)maleate, Bis-(2-ethylhexyl)ester kyseliny maleinove [Czech], Di-(2-ethylhexyl)maleate, Maleic acid, bis(2-ethylhexyl) ester, RC Comonomer DOM, [ChemIDplus]
Bis(2-ethylhexyl) maleate, Di-2-ethylhexyl maleate, Dioctyl maleate, Bis(2-ethylhexyl) maleate, Di-2-ethylhexyl maleate, Dioctyl maleate, 2-Butenedioic Acid (2Z)-Bis(2-ethylhexyl) Ester, 2-Butenedioic Acid (Z)-Bis(2-ethylhexyl) Ester, (USP), bis 2-ethylhexyl maleate, di-2-ethylhexyl maleate, rc comonomer dom, di 2-ethylhexyl maleate, maleic acid, bis 2-ethylhexyl ester, 2-butenedioic acid 2z-, bis 2-ethylhexyl ester, maleic acid dioctyl ester, 2-butenedioic acid z-, bis 2-ethylhexyl ester, (Di(2‑ethylhexyl) Maleate, Dioctyl Maleate, Maleic Acid Di(2‑ethylhexyl) Ester, Maleic Acid Dioctyl Ester, Di‑2‑ethylhexyl maleate, 2‑Butenedioic acid (Z)‑bis(2‑ethylhexyl) ester, DOM), Bis(2-ethylhexyl) maleate, 142-16-5, Bis(2-ethylhexyl)maleate, Di-2-ethylhexyl maleate, RC Comonomer DOM, diethylhexyl maleate, Di-(2-ethylhexyl)maleate, Maleic acid, bis(2-ethylhexyl) ester, bis(2-ethylhexyl) (Z)-but-2-enedioate, HSDB 5481, 2-Butenedioic acid (Z)-, bis(2-ethylhexyl) ester, 2-Butenedioic acid (2Z)-, bis(2-ethylhexyl) ester, diethylhexyl malate, EINECS 205-524-5, C2F7JHI12L, BRN 1729133, DTXSID2027094, DERMOL DOM, AI3-07870, Bis-(2-ethylhexyl)ester kyseliny maleinove, CERAPHYL 45, Bis-(2-ethylhexyl)ester kyseliny maleinove [Czech], LANOL 84 D, 2-Butenedioic acid (2Z)-, 1,4-bis(2-ethylhexyl) ester, DTXCID007094, EC 205-524-5, DI-2-ETHYLHEXYL MALEATE [HSDB], BIS(2-ETHYLHEXYL)MALEATE [USP-RS], Dioctyl" maleate, 2-BUTANEDIOIC ACID (2Z)-, BIS(2-ETHYLHEXYL) ESTER, BIS(2-ETHYLHEXYL)MALEATE (USP-RS), Di(2ethylhexyl)maleate, Bis(2ethylhexyl)maleate, Bis(2ethylhexyl) maleate, DIETHYLHEXYL MALATE [INCI], DIETHYLHEXYL MALEATE [INCI], Maleic acid, bis(2ethylhexyl) ester, Bis(2ethylhexyl)ester kyseliny maleinove, 2Butenedioic acid (Z), bis(2ethylhexyl) ester, 205-524-5, 946-236-6, Di(2-ethylhexyl) Maleate, MFCD00027250, bis(2-ethylhexyl) (2Z)-but-2-enedioate, CAS-142-16-5, 4-02-00-02211 (Beilstein Handbook Reference), UNII-C2F7JHI12L, Bis(2 ethylhexyl)maleate, Maleic Acid Dioctyl Ester, di-(2-ethylhexyl) maleate, SCHEMBL87501, CHEMBL1881816, Bis(2-ethylhexyl) maleate, 90%, Maleic Acid Di(2-ethylhexyl) Ester, Tox21_201422, Tox21_303254, Maleic acid-bis(2-ethylhexyl) ester, NSC345392, SBB060328, AKOS015836338, FB62553, NSC-345392, Bis(2-ethylhexyl) (2Z)-2-butenedioate, NCGC00164190-01, NCGC00164190-02, NCGC00256962-01, NCGC00258973-01, BS-42276, Di(2-ethylhexyl) Maleate;Dioctyl Maleate, di2-ethylhexyl (2Z)but-2-ene-1,4-dioate, CS-0152377, M0011, NS00003256, 2-Butenedioic acid (z), di-2-ethylhexyl ester, Q27275096, Bis(2 ethylhexyl)maleate, Pharmaceutical Secondary Standard; Certified Reference Material, Bis(2-ethylhexyl) maleate, United States Pharmacopeia (USP) Reference Standard, 2-Butenedioic acid (Z)-, bis(2-ethylhexyl) ester, Maleic acid, bis(2-ethylhexyl) ester, Bis-(2-ethylhexyl)ester kyseliny maleinove, Di-(2-ethylhexyl)maleate, DOM, RC Comonomer DOM, Bis(2-ethylhexyl) (2Z)-2-butenedioate, 2-Butenedioic acid (Z), di-2-ethylhexyl ester, 2-Butenedioic acid (2Z)-, 1,4-bis(2-ethylhexyl) ester, 2-Butenedioic acid (2Z)-, bis(2-ethylhexyl) ester, 2- butenedioic acid (2Z)-, bis(2-ethylhexyl) ester, 2- butenedioic acid (Z)-, bis(2-ethylhexyl) ester, 2- butenedioic acid, bis(2-ethylhexyl) ester, (2Z)-, dermol DOM, di-(2-ethylhexyl)maleate, di-2-ethylhexyl maleate, di(2-ethylhexyl) maleate, di2-ethylhexyl (2Z)but-2-ene-1,4-dioate, dioctyl maleate (so called), 2- ethylhexyl maleate, bis(2- ethylhexyl) (2Z)-2-butenedioate, bis(2- ethylhexyl) (2Z)-but-2-enedioate, bis(2- ethylhexyl) (Z)-but-2-enedioate, bis(2- ethylhexyl) maleate, bis(2- ethylhexyl)maleate, hallstar DOM, maleic acid di(2-ethylhexyl) ester, maleic acid dioctyl ester, maleic acid, bis(2-ethylhexyl) ester, RC comonomer DOM

Maleic acid dioctyl ester is an ester of maleic acid and 2-ethylhexanol, appearing as a clear, colorless to pale yellow liquid with low volatility and a characteristic mild odor.
Maleic acid dioctyl ester is primarily used as a specialty plasticizer, imparting flexibility, softness, and durability to polymers such as polyvinyl chloride (PVC), vinyl acetate copolymers, and other resins.

Due to its excellent compatibility, Maleic acid dioctyl ester enhances cold resistance, low-temperature flexibility, and weathering performance, making it valuable in applications such as films, coatings, adhesives, and synthetic leather.
Maleic acid dioctyl ester's reactivity also enables use as a comonomer in the production of specialty polymers, where it contributes to improved elongation, surface properties, and adhesion.
Stable under normal handling conditions, Maleic acid dioctyl ester is considered a versatile additive across both plastics and coatings industries.

Maleic acid dioctyl ester is a potential anti-inflammatory and antimicrobial agent, extracted from Urtica dioica L. (Urticaceae) leaves.
Maleic acid dioctyl ester is a carboxylic acid derivative and an organic ester.
Maleic acid dioctyl ester appears at room temperature as a colorless to slightly yellowish liquid with a mild, characteristic odor.

Maleic acid dioctyl ester is typically viscous in consistency and exhibits low volatility under standard atmospheric conditions.
Due to its ester functional groups, Maleic acid dioctyl ester demonstrates limited solubility in water but is miscible with many common organic solvents such as alcohols, ethers, and hydrocarbons.

Maleic acid dioctyl ester was first synthesized in the mid-20th century during investigations into plasticizers and polymer modifiers.
Maleic acid dioctyl ester is commonly prepared via the esterification of maleic acid with 2-ethylhexanol under acidic catalytic conditions, often using sulfuric acid or solid acid catalysts to facilitate the condensation reaction while removing water azeotropically.

Maleic acid dioctyl ester is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 1 000 to < 10 000 tonnes per annum.
Maleic acid dioctyl ester is a fatty acid that is used in pharmaceutical preparations as a basic structure.

Maleic acid dioctyl ester has a reactive hydroxyl group and can be used as a chemical species.
Maleic acid dioctyl ester is an alkanoic acid that can be converted to maleic acid by reacting with water vapor.
This conversion increases the reactivity of the hydroxyl group, which makes Maleic acid dioctyl ester useful for reactions with other chemicals.

Maleic acid dioctyl ester also reacts with calcium stearate to form dimethyl fumarate, which is used in the production of polycarboxylic acids.
Maleic acid dioctyl ester is a chemical compound that functions as a plasticizer in experimental applications.

Maleic acid dioctyl ester interacts at the molecular level by forming strong, flexible bonds with polymer chains, thereby increasing the flexibility and durability of plastic materials.
Maleic acid dioctyl ester acts by reducing the intermolecular forces between polymer chains, allowing them to slide past one another more easily.

This results in improved flexibility and resistance to breaking or cracking in plastic products.
Maleic acid dioctyl ester achieves this by effectively lubricating the polymer chains, enhancing their ability to move and bend without becoming brittle.

For safe storage, Maleic acid dioctyl ester should be kept in tightly sealed containers in a cool, well-ventilated area, away from strong oxidizing agents and heat sources.
Maleic acid dioctyl ester is a derivative of malic acid, with emollient and skin-conditioning properties.

Maleic acid dioctyl ester can also be used as a solvent in cosmetic preparations.
Maleic acid dioctyl ester is synthetically manufactured.

Maleic acid dioctyl ester is the chemical compound with the structural formula (H3C(−CH2)3−CH(−CH2−CH3)−CH2−O−C(=O)−CH=)2, where the two carboxylate groups are mutually cis.
Maleic acid dioctyl ester can be described as the double ester of maleic acid with the alcohol 2-ethylhexanol.

Maleic acid dioctyl ester is commonly called dioctyl maleate (DOM), reflecting the older usage of "octane" to refer to any 8-carbon alkane, straight-chained or branched.
Maleic acid dioctyl ester is manufactured by treating 2-ethylhexanol with maleic anhydride and an esterification catalyst.

Maleic acid dioctyl ester is a key intermediate raw material in the production of dioctyl sulfosuccinate (DOSS, docusate) salts, used medically as laxatives and stool softeners, and in many other applications as versatile surfactants
Maleic acid dioctyl ester is a chemical compound from the group of carboxylic acid esters .

Maleic acid dioctyl ester is a liquid between -60 and 164∘C(boiling point at 10 mmHg).
Maleic acid dioctyl ester is a derivative of malic acid, with emollient and skin-conditioning properties.
Maleic acid dioctyl ester is synthetically manufactured.

Maleic acid dioctyl ester is an aliphatic ester which is prepared by catalytic esterification of maleic acid and 2-ethylhexyl alcohol.
General description Maleic acid dioctyl ester is an aliphatic ester which is prepared by catalytic esterification of maleic acid and 2-ethylhexyl alcohol.

In the plastics industry, Maleic acid dioctyl ester is used with PVC, vinyl chloride–vinyl acetate copolymers, acrylates, and other resins, where it enhances elongation, cold resistance, weatherability, and overall processing behavior.
Beyond its role as a plasticizer, Maleic acid dioctyl ester also functions as a comonomer in the synthesis of specialty polymers, where the reactive double bond of the maleate group participates in copolymerization, improving adhesion, film-forming ability, and surface properties in coatings, adhesives, and sealants.

Maleic acid dioctyl ester's combination of excellent compatibility, low migration tendency, and balanced performance profile makes it especially suitable for demanding applications such as synthetic leather, flexible films, wire and cable coatings, and decorative laminates.
Maleic acid dioctyl ester is chemically stable under normal conditions, resistant to hydrolysis, and remains effective across a wide range of temperatures, making it a versatile additive bridging both performance enhancement and formulation flexibility in industrial and specialty polymer applications.

Market Overview of Maleic Acid Dioctyl Ester:
The global market for Maleic acid dioctyl ester is steadily expanding as industries seek versatile, non-phthalate plasticizers and reactive monomers for coatings, adhesives, sealants, and polymer applications.
Traditionally used in vinyl acetate copolymers, PVC, and acrylic emulsions to impart softness, flexibility, and low-temperature durability, Maleic acid dioctyl ester has gained renewed importance as regulatory agencies in Europe and North America restrict the use of phthalate plasticizers, creating demand for safer alternatives.

The market is supported by growing consumption in construction, automotive, packaging, and consumer goods, with Asia-Pacific, particularly China and India, driving demand due to rapid industrialization and strong downstream polymer production.
Europe and North America represent mature but innovation-driven markets, where Maleic acid dioctyl ester is valued for its performance in specialty coatings, adhesives, and film technologies that require both plasticizing and reactive functionality.

Global revenues for dioctyl maleate are projected to rise at a CAGR of around 4–5% through the early 2030s, reaching close to USD 370–400 million by 2030, driven by the shift toward eco-friendly and high-performance additives.
Challenges to growth include feedstock cost volatility, competition from other non-phthalate and bio-based plasticizers, and compliance costs related to environmental and toxicological testing.
Nonetheless, Maleic acid dioctyl ester is positioned as a strategic additive that bridges performance and sustainability, ensuring its continued relevance across multiple industrial value chains.

Uses of Maleic Acid Dioctyl Ester:
Maleic acid dioctyl ester is primarily used as a specialty plasticizer and reactive monomer in the production of flexible polymers, coatings, adhesives, and sealants, where it enhances elasticity, cold resistance, and overall durability.
In the plastics sector, Maleic acid dioctyl ester is incorporated into PVC, vinyl chloride–vinyl acetate copolymers, acrylates, and specialty resins, providing improved softness, elongation, and weatherability, which are critical for applications such as synthetic leather, decorative laminates, flexible films, and wire and cable insulation.

Maleic acid dioctyl ester's reactive double bond allows it to act as a comonomer in emulsion and solution polymerizations, where it improves adhesion, gloss retention, and film-forming properties in coatings and adhesive formulations.
Maleic acid dioctyl ester also finds use in pressure-sensitive adhesives and sealants, where it contributes to tack balance and cohesive strength.

In inks, paints, and surface coatings, Maleic acid dioctyl ester functions both as a plasticizer and a performance enhancer, improving scratch resistance, rub resistance, and flexibility without significantly increasing volatility.
Beyond its role in industrial polymers, Maleic acid dioctyl ester is valued in the development of eco-friendlier plasticizer systems as an alternative to conventional phthalates, aligning with global trends toward safer, non-toxic, and sustainable additives.

Maleic acid dioctyl ester is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Maleic acid dioctyl ester can also be used as a solvent in cosmetic preparations.

Maleic acid dioctyl ester is used as a green plasticizer in variety of applications such as adhesives and coatings.
Maleic acid dioctyl ester is used in the following products: adhesives and sealants, heat transfer fluids, hydraulic fluids, perfumes and fragrances and cosmetics and personal care products.

Other release to the environment of Maleic acid dioctyl ester is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners).
Release to the environment of Maleic acid dioctyl ester can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal).

Maleic acid dioctyl ester is a key intermediate raw material in the production of dioctyl sulfosuccinate (DOSS, docusate) salts, used medically as laxatives and stool softeners, and in many other applications as versatile surfactants.
Maleic acid dioctyl ester is used as a comonomer and internal plasticizer with vinyl acetate, acrylates, methacrylates, and n-vinyl-n-methylacetamide.

Maleic acid dioctyl ester is also used to make sulfosuccinate anionic surfactants.
Maleic acid dioctyl ester is used in paints, lacquers, varnishes, textiles, and adhesives.

Maleic acid dioctyl ester can be found in complex articles, with no release intended: vehicles.
Maleic acid dioctyl ester can be found in products with material based on: plastic (e.g. food packaging and storage, toys, mobile phones), rubber used for large surface area articles (e.g. construction and building materials for flooring) and plastic used for large surface area articles (e.g. construction and building materials for flooring, insulation).

Maleic acid dioctyl ester is widely used as a plasticizer and comonomer, particularly in adhesives, coatings, films, rubbers, and polymers like vinyl acetate and acrylics.
Maleic acid dioctyl ester provides flexibility, transparency, and impact resistance in polymer materials.

Maleic acid dioctyl ester is employed as a green alternative to phthalate-based plasticizers in sustainable formulations.
Maleic acid dioctyl ester is used in the following products: adhesives and sealants, coating products and hydraulic fluids.
Maleic acid dioctyl ester is used for the manufacture of: rubber products and plastic products.

Maleic acid dioctyl ester is used in the following products: inks and toners.
Maleic acid dioctyl ester is used as a plasticizer in a variety of applications such as adhesives and coatings.

Maleic acid dioctyl ester is also used as a comonomer and plasticizer in the production of vinyl acetate , acrylates , and methacrylates
Maleic acid dioctyl ester is used in the following products: adhesives and sealants.

Maleic acid dioctyl ester has an industrial use resulting in manufacture of another substance (use of intermediates).
Maleic acid dioctyl ester is used for the manufacture of: chemicals.

Maleic acid dioctyl ester is also used as a solid catalyst for polymerization reactions and has been shown to be useful for particle synthesis.
Maleic acid dioctyl ester is also used in the preparation of lubricants additives.

Maleic acid dioctyl ester is suitable for scientific research.
In experimental applications, Maleic acid dioctyl ester′s mechanism of action involves enhancing the performance and longevity of plastic materials by modifying their physical properties.

Maleic acid dioctyl ester's function as a plasticizer allows for the development of more flexible and durable plastic products without compromising their structural integrity.
Maleic acid dioctyl ester finds primary application in the plastics industry as a secondary plasticizer, particularly in polyvinyl chloride (PVC) formulations, where it contributes flexibility and improved thermal stability.

Maleic acid dioctyl ester is also used in adhesives, sealants, and coatings due to its compatibility with various resin systems.
Maleic acid dioctyl ester does not occur naturally in significant quantities and is exclusively produced through industrial synthesis.
The large-scale production process typically involves continuous esterification reactors operating at elevated temperatures with efficient agitation and controlled molar ratios of reactants.

Benefits of Maleic Acid Dioctyl Ester:
High molecular weight with very low volatility and thermal stability.
Excellent compatibility and flexibility-enhancement in polymer systems.

Transparent and color-stable, with low acid value and moisture content in high-grade grades.
Hydrophobic character supports durability in coatings and elastomers.

Production of Maleic Acid Dioctyl Ester:
Maleic acid dioctyl ester is produced through the esterification of maleic anhydride (or maleic acid) with 2-ethylhexanol in the presence of an acid catalyst, typically under controlled temperature and vacuum conditions to ensure high conversion and purity.
The process involves the reaction of the hydroxyl groups of 2-ethylhexanol with the carboxyl groups of maleic anhydride to form the diester, while continuous removal of water formed during the reaction drives the equilibrium toward ester formation.

Industrial production is generally carried out in stainless steel or glass-lined reactors equipped with efficient stirring, heating, and condensation systems to optimize yield and prevent side reactions.
To improve product stability and color, the crude ester undergoes neutralization, washing, filtration, and vacuum distillation, yielding a clear, low-volatility liquid of high ester content.

Modern processes emphasize energy efficiency and environmental compliance, often incorporating closed systems to minimize emissions and advanced purification techniques to reduce residual acidity and improve storage stability.
The key raw materials—maleic anhydride and 2-ethylhexanol—are both large-volume petrochemical derivatives, ensuring a secure supply chain, though their cost fluctuations can influence production economics.
The resulting Maleic acid dioctyl ester is manufactured to meet strict industrial performance and regulatory standards, enabling its use in sensitive applications such as coatings, adhesives, and flexible polymer formulations.

History of Maleic Acid Dioctyl Ester:
The history of Maleic acid dioctyl ester is closely linked to the mid-20th century expansion of maleic anhydride chemistry and the search for new plasticizers and reactive esters to support the fast-growing plastics and coatings industries.
After World War II, industrial chemists explored maleate esters for their unique combination of plasticizing ability and unsaturated reactivity, which distinguished them from traditional phthalates and adipates.

By the 1950s–1960s, Maleic acid dioctyl ester was being commercially produced and adopted as both a specialty plasticizer in PVC and vinyl acetate copolymers and as a comonomer in emulsion polymerizations for coatings and adhesives.
Maleic acid dioctyl ester's ability to improve flexibility while also chemically incorporating into polymer chains gave it advantages in durability and migration resistance compared to non-reactive plasticizers.

Over subsequent decades, as global demand for synthetic leather, flexible films, and high-performance coatings increased, Maleic acid dioctyl ester became an established industrial product.
In the late 20th and early 21st centuries, the regulatory shift away from phthalates in Europe, North America, and parts of Asia created renewed interest in maleate esters, positioning Maleic acid dioctyl ester as a safer, high-performance alternative.
Today, Maleic acid dioctyl ester continues to play a dual role as both a functional plasticizer and a reactive building block in specialty polymers, reflecting a long history of adaptation to evolving industrial and environmental needs.

Handling and Storage of Maleic Acid Dioctyl Ester:

Handling:
Avoid contact with skin, eyes, and clothing.
Use only in well-ventilated areas to prevent inhalation of vapors, especially when heated.

Prevent the formation of aerosols or mists.
Do not eat, drink, or smoke while handling the product.
Wash thoroughly after handling.

Storage:
Store in tightly closed containers in a cool, dry, and well-ventilated area, away from direct sunlight, open flames, and heat sources.
Protect from moisture and strong oxidizing agents such as peroxides, chromates, and nitric acid.

Recommended storage temperature: 15–25 °C.
Keep containers sealed when not in use to avoid contamination and degradation.

Stability and Reactivity of Maleic Acid Dioctyl Ester:

Stability:
Stable under recommended handling and storage conditions.

Reactivity:
No hazardous polymerization expected under normal use.

Incompatible materials:
Strong oxidizing agents (e.g., chromates, permanganates, concentrated nitric acid) and strong bases can initiate unwanted reactions.

Hazardous decomposition products:
Upon thermal decomposition or combustion, releases carbon oxides (CO, CO₂), acrid smoke, and hydrocarbon fragments.

Conditions to avoid:
Prolonged heating above 200 °C, direct flame exposure, and uncontrolled contact with oxidizers.

First Aid Measures of Maleic Acid Dioctyl Ester:

Inhalation:
Move exposed person to fresh air.
If breathing is difficult or irritation persists, seek medical attention.

Skin contact:
Wash affected area thoroughly with soap and water.
Remove contaminated clothing.
Seek medical advice if irritation or redness occurs.

Eye contact:
Rinse cautiously with water for at least 15 minutes, keeping eyelids open.
Remove contact lenses if present and easy to do.
Obtain medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Do not induce vomiting unless instructed by medical personnel.
Seek medical advice if large quantities are ingested or symptoms occur.

Firefighting Measures of Maleic Acid Dioctyl Ester:

Suitable extinguishing media:
Foam, dry chemical, carbon dioxide (CO₂), or water spray.

Unsuitable extinguishing media:
Do not use a direct water jet, as Maleic acid dioctyl ester may spread burning liquid.

Specific hazards:
Combustion produces dense smoke, carbon oxides, and irritating vapors.
Product may form flammable mixtures with air at elevated temperatures.

Protective equipment for firefighters:
Firefighters should wear self-contained breathing apparatus (SCBA) and full protective gear.
Cool containers exposed to fire with water spray.

Accidental Release Measures of Maleic Acid Dioctyl Ester:

Personal precautions:
Wear personal protective equipment including gloves, goggles, and suitable respirator if vapor or mist is present.
Provide adequate ventilation.
Eliminate ignition sources.

Environmental precautions:
Prevent material from entering drains, surface water, or soil.
Large spills may pose environmental risks due to persistence.

Methods for cleaning up:
Contain and absorb spills with inert material (sand, earth, vermiculite).
Collect mechanically into labeled containers for recovery or disposal.

Clean affected area with detergent and water.
Dispose of waste in accordance with local regulations.

Exposure Controls / Personal Protective Equipment of Maleic Acid Dioctyl Ester:

Engineering controls:
Use local exhaust or general dilution ventilation to keep airborne concentrations below exposure limits, particularly during heating or spraying operations.

Respiratory protection:
Not normally required under ambient conditions.
If vapors/mists are generated above permissible limits, wear a NIOSH/EN-approved organic vapor respirator.

Hand protection:
Wear chemical-resistant gloves (nitrile, neoprene, or PVC).

Eye protection:
Safety glasses with side shields or chemical splash goggles are recommended.

Skin and body protection:
Wear protective clothing (long sleeves, lab coat, or chemical apron) to prevent skin contact.

Hygiene measures: Wash hands and face after handling. Do not eat, drink, or smoke in work areas. Remove and wash contaminated clothing before reuse.

Identifiers of Maleic Acid Dioctyl Ester:
CAS Number: 142‑16‑5
EC Number: 205‑524‑5
MDL Number: MFCD00027250
IUPAC Name: Bis(2‑ethylhexyl) (2 Z)‑but‑2‑enedioate
Molecular Formula: C₂₀H₃₆O₄
Molecular Weight: ~340.50 g/mol

Molecular Weight: 340.5 g/mol
Smiles: CCCCC(CC)COC(=O)/C=CC(=O)OCC(CC)CCCC
Melting Point: -60 °C
Density: 0.944 g/cm3
Flash Point: 185 °C
CAS: 142-16-5
Molecular Formula: C20H36O4
Molecular Weight (g/mol): 340.504
MDL Number: MFCD00027250

InChI Key: ROPXFXOUUANXRR-YPKPFQOOSA-N
PubChem CID: 5365125
IUPAC Name: bis(2-ethylhexyl) (Z)-but-2-enedioate
SMILES: CCCCC(CC)COC(=O)C=CC(=O)OCC(CC)CCCC
Melting Point: -60°C
Color: Colorless
Boiling Point: 173°C
Formula Weight: 340.50

Percent Purity: ≥93.0% (GC)
Physical Form: Liquid
Chemical Name or Material: Bis(2-ethylhexyl) Maleate
InChI: InChI=1S/C20H36O4/c1-5-9-11-17(7-3)15-23-19(21)13-14-20(22)24-16-18(8-4)12-10-6-2/h13-14,17-18H,5-12,15-16H2,1-4H3/b14-13-
InChI Key: ROPXFXOUUANXRR-YPKPFQOOSA-N
Formula: C20H36O4
SMILES: CCCCC(CC)COC(=O)C=CC(=O)OCC(CC)CCCC
Molecular Weight1: 340.50
CAS: 142-16-5

Molecular Formula: C20H36O4
Molecular Weight: 340.5
InChI: InChI=1S/C20H36O4/c1-5-9-11-17(7-3)15-23-19(21)13-14-20(22)24-16-18(8-4)12-10-6-2/h13-14,17-18H,5-12,15-16H2,1-4H3/b14-13-
InChIKey: ROPXFXOUUANXRR-YPKPFQOOSA-N
Smiles: C(OCC(CC)CCCC)(=O)/C=CC(OCC(CC)CCCC)=O
CAS No: [142-16-5]
Synonyms: Maleic acid dioctyl ester
Synonyms: Dioctyl Maleate
Product Code: FB62553
MDL No: MFCD00027250
Chemical Formula: C20H36O4

CAS Number: 142-16-5
Molecular Weight: 340.50
EC Number: 205-524-5
MDL number: MFCD00027250
UNSPSC Code: 12162002
PubChem Substance ID: 24871210
NACRES: NA.23
CBNumber: CB6393335

Properties of Maleic Acid Dioctyl Ester:
IUPAC Name: Bis(2‑ethylhexyl) (2 Z)‑but‑2‑enedioate
CAS Number: 142‑16‑5
EC / EINECS Number: 205‑524‑5
PubChem CID: 5365125
ChemSpider ID: 4517207
Appearance: Colorless to pale yellow clear oily liquid
Odor: Mild ester odor, described as slight or faint
Density: ~0.94g/cm³ at 20°C
Melting / Pour Point: Around −60°C
Boiling Point: ~156°C at ~0.7–1mmHg (~173°C at 3mmHg),
estimated ~410°C at atmospheric pressure

Molecular Weight: 340.5 g/mol
XLogP3-AA: 6.5
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 4
Rotatable Bond Count: 16
Exact Mass: 340.26135963 Da
Monoisotopic Mass: 340.26135963 Da
Topological Polar Surface Area: 52.6 Å²
Heavy Atom Count: 24
Complexity: 329
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 2
Defined Bond Stereocenter Count: 1
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes

Assay: 95.00 to 100.00
Food Chemicals Codex Listed: No
Boiling Point: 409.81 °C. @ 760.00 mm Hg (est)
Flash Point: 375.00 °F. TCC (190.40 °C.) (est)
logP (o/w): 7.691 (est)
Soluble in: alcohol
Soluble in: water, 0.001167 mg/L @ 25 °C (est)
Insoluble in: water
Molecular Formula / Molecular Weight: C20H36O4 = 340.50
Physical State (20 deg.C): Liquid

Storage Temperature: Room Temperature (Recommended in a cool and dark place, <15°C)
CAS RN: 142-16-5
Reaxys Registry Number: 1729133
PubChem Substance ID: 87572131
SDBS (AIST Spectral DB): 7571
MDL Number: MFCD00027250
Chemical formula: C20H36O4
Molar mass: 340.504 g·mol−1
Appearance: Colorless liquid
Density: 0.94 g/cm3

Flash point: >230 °F
storage temp.: Sealed in dry, Room Temperature
solubility: Chloroform (Sparingly), Ethyl Acetate(Slightly), Methanol (Slightly)
form: Liquid
color: Colourless
Viscosity: 16cp (25C)
Water Solubility: 18μg/L at 20℃
InChIKey: ROPXFXOUUANXRR-YPKPFQOOSA-N
LogP: 7.24 at 25℃
CAS DataBase Reference: 142-16-5(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances: Maleic acid dioctyl ester
FDA 21 CFR: 175.105; 176.180

EWG's Food Scores: 4-7
FDA UNII: C2F7JHI12L
NIST Chemistry Reference: 2-Butenedioic acid (z), di-2-ethylhexyl ester(142-16-5)
EPA Substance Registry System: 2-Butenedioic acid (2Z)-, 1,4-bis(2-ethylhexyl) ester (142-16-5)
UNSPSC Code: 41116107
NACRES: NA.24
Molecular form: C20H36O4
Appearance: Clear Colorless Oil
Mol. Weight: 340.5