DIOCTYLAMINE

Dioctylamine, also called di-n-octylamine and N-octyloctan-1-amine, is a secondary aliphatic amine with CAS 1120-48-5 and formula C16H35N, used as a synthesis intermediate and evaluated in separation and surface-active formulations. Its two straight C8 chains provide hydrophobic character while the secondary nitrogen offers basicity and a reactive N-H group. Protonation and nucleophilic reactions allow the amine to form salts or derivatives, with phase behavior and selectivity determined by the surrounding formulation.

CAS No: 1120-48-5
EC No: 214-311-6
Molecular formula: C16H35N
Molecular weight: Approximately 241.46 g/mol
Appearance: Colorless to yellow liquid or solid, depending on temperature
Melting range: Approximately 13-16 °C
Boiling point: Approximately 297-298 °C
Density: Approximately 0.80 g/cm3 near room temperature
Water miscibility: Very low for the free base
Storage character: Air-sensitive and hygroscopic in published supplier information

WHAT IS DIOCTYLAMINE?

Dioctylamine (di-n-octylamine, CAS 1120-48-5) is a secondary amine containing two straight octyl groups and one nitrogen-bound hydrogen, used to prepare specialty nitrogen-containing chemicals. Its hydrophobic structure also makes it relevant to organic-phase separation and formulation studies.

The nitrogen can accept a proton or react with electrophiles. Salt formation changes the chemical species and can change water distribution, aggregation and solubility. The free base and its acid salts must not be treated as having identical properties.

Manufacturing routes for long-chain secondary amines include catalytic amination and reductive amination. For this product, primary and tertiary amine by-products can be important purchasing variables. The CAS number does not disclose a particular supplier's manufacturing route or purification history.

Reagent grades with declared assay around 95-98% are commercially available. Chromatographic assay and nonaqueous titration measure different aspects of quality, so the methods should be identified. Water, other amines and isomer profile can be more important than a nominal purity number for a particular reaction.

The straight-chain compound is distinct from bis(2-ethylhexyl)amine, octylamine and trioctylamine. These substances differ in branching or amine substitution and are not interchangeable solely because their names contain octylamine.

COMMON PRODUCT & CHEMICAL NAMES OF DIOCTYLAMINE:

Dioctylamine
Di-n-octylamine
Di(n-octyl)amine
N-Octyloctan-1-amine
N-Octyl-1-octanamine
1-Octanamine, N-octyl-
Di(oct-1-yl)amine
Bis(oct-1-yl)amine

These names describe the secondary amine with two linear octyl chains. The n prefix distinguishes the straight-chain groups. Formula notations are structural information rather than additional product names.

Bis(2-ethylhexyl)amine, CAS 106-20-7, has the same molecular formula but branched chains. Octylamine, CAS 111-86-4, is primary, while trioctylamine, CAS 1116-76-3, is tertiary. Match the CAS identifier and structure when ordering.

CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION OF DIOCTYLAMINE

Product name: Dioctylamine
Chemical name: N-Octyloctan-1-amine
CAS No: 1120-48-5
EC / EINECS No: 214-311-6
Molecular formula: C16H35N
Molecular weight: Approximately 241.46 g/mol
Condensed structure: CH3(CH2)7NH(CH2)7CH3
Chemical class: Secondary aliphatic dialkylamine
Main functions: Reactive intermediate, salt precursor and organic-phase amine component

Identity numbers do not establish assay, branching impurities, water or permitted end use. For the offered source's current regulatory and REACH information, please contact Ataman Kimya. A research-grade catalogue entry does not establish unrestricted industrial supply coverage.

CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF DIOCTYLAMINE

The nitrogen is bonded to two n-octyl chains and one hydrogen and carries a lone electron pair. The N-H bond can donate a hydrogen bond, while the unprotonated nitrogen lone pair can accept one. These roles should not both be assigned to the hydrogen atom itself.

Two C8 chains give substantial hydrophobic character. The neutral amine and the protonated ammonium ion have different interactions with water and counterions. A single predicted pKa without solvent, temperature and method is not adopted as a product specification.

HOW DOES DIOCTYLAMINE WORK AT THE MOLECULAR LEVEL?

Acids protonate the nitrogen to form a secondary ammonium salt. In extraction systems, suitable ion pairing and complex formation can transfer selected acids or anionic species into an organic phase. The counterion, diluent, acidity and loading determine whether the salt remains soluble, precipitates or forms another phase.

As a nucleophile, the amine can be converted into tertiary amines or N,N-dioctyl amides under appropriate reaction conditions. Subsequent alkylation of a tertiary amine can give a quaternary ammonium derivative. Having one N-H bond therefore does not guarantee that alkylation stops after one substitution.

Functions include:

Introducing a dioctyl-substituted nitrogen group
Forming ammonium salts with suitable acids
Providing a precursor for surface-active derivatives
Contributing to selected extraction and interface studies

Adsorption and surface effects depend on the complete system and do not demonstrate universal corrosion protection or nanoparticle shape control. Reaction medium, purity, water, temperature and competing species all affect performance.

PHYSICAL AND CHEMICAL PROPERTIES OF DIOCTYLAMINE

Representative published properties:

Appearance: Colorless to yellow clear liquid, or solid material near and below its melting range
Chemical character: Basic secondary amine
Molecular formula: C16H35N
Molecular weight: Approximately 241.46 g/mol
Melting range: Approximately 13-16 °C
Boiling point: Approximately 297-298 °C
Relative density: Approximately 0.80 near room temperature
Refractive index: Approximately 1.44
Free-base water miscibility: Very low
Air and moisture sensitivity: Reported by suppliers

One published reagent specification sets at least 96.0% by GC and at least 96.0% by nonaqueous titration. These are method-specific acceptance limits for that grade, not a universal assay for every commercial delivery.

The freezing behavior matters during receiving and dosing. A cool shipment can contain solid or partly solid material. Use only a confirmed conditioning procedure and reassess homogeneity and acceptance criteria rather than assuming that warming restores every quality parameter.

Published flash-point values vary, with one reviewed product listing giving approximately 159 °C and other documents using different values or methods. Confirm the grade-specific method rather than mixing open-cup and closed-cup results. The amine remains combustible.

Do not copy ambiguous vapor-pressure units or an unqualified predicted basicity value into the specification. Low volatility does not remove the danger of corrosive liquid contact or inhalation of generated mist.

The neat liquid is less dense than water under the reported conditions, but a formulated or loaded extraction phase is not guaranteed to be the upper phase. Solvents, dissolved acid and extracted material change density and phase behavior.

For current assay, other-amine limits, water, flash point and shelf life of the offered product, please contact Ataman Kimya. These reference data do not replace an agreed specification.

PHASE EQUILIBRIA AND SALT FORMATION WITH DIOCTYLAMINE

An organic-soluble free base does not imply that every ammonium salt will be oil-soluble. Counterion hydration, acidity, diluent polarity and temperature can change distribution or cause precipitation and third-phase formation.

Evaluate extraction, stripping, phase disengagement and amine loss together. Metal speciation must support the proposed extraction mechanism. A result for one acid or metal complex cannot establish selectivity for another feed.

SECTORS AND INDUSTRIAL APPLICATIONS OF DIOCTYLAMINE

Main areas of evaluation:

Specialty amine and amide synthesis
Surface-active and antistatic derivative manufacture
Acid and selected metal extraction studies
Oil-based surface-protection formulations
Analytical and interfacial chemistry research

DIOCTYLAMINE IN SPECIALTY SYNTHESIS

Purpose: Introduce two linear octyl groups attached to nitrogen.
Function: Act as a secondary amine reactant.
Performance effect: Provides a defined hydrophobic nitrogen-containing building block.
Limitations: Primary and tertiary amine impurities can change stoichiometry and product distribution.

DIOCTYLAMINE IN EXTRACTION SYSTEMS

Purpose: Transfer selected species between phases.
Function: Participate through protonation and organic-phase ion pairing.
Performance effect: Can support separation when the feed chemistry is suitable.
Limitations: Precipitation, emulsions, third phases and aqueous losses require measurement.

DIOCTYLAMINE IN SURFACE-ACTIVE DERIVATIVES

Purpose: Prepare salts and other derivatives for interface-related functions.
Function: Supply the secondary amine and hydrophobic chains.
Performance effect: Depends on the finished derivative and its formulation.
Limitations: The free amine is not automatically a validated softener, corrosion inhibitor or antistatic product.

WHICH PROBLEMS CAN DIOCTYLAMINE HELP SOLVE?

Need for an oil-compatible nitrogen building block
The two octyl chains can improve affinity for nonpolar media, subject to actual solubility testing.

Need for a secondary rather than primary or tertiary amine
The N-H functionality supports selected reactions, but selectivity still depends on reagents and conditions.

Difficulty separating an acid or anionic species
The amine can be evaluated in a designed extraction system. Distribution and regeneration must be demonstrated.

Inconsistent reaction or phase behavior
Controlling water, other amines and isomer identity helps distinguish raw-material effects from process variation.

THINGS TO CONSIDER WHEN USING DIOCTYLAMINE

A major mistake is treating a low-volatility oily liquid as a mild solvent. Corrosive exposure and aquatic hazards remain relevant even without strong evaporation.

Confirm straight-chain identity and the assay method.
Specify primary and tertiary amine limits where needed.
Assess neutralization and derivatization as heat-releasing operations.
Keep air and moisture exposure controlled.
Evaluate equipment, seals and substrates for the actual blend.
Avoid unintended contact with oxidants or nitrosating contaminants.
Characterize both phases after extraction and collect the waste.

Use appropriate splash goggles, face protection, chemical-resistant gloves and protective clothing. Provide ventilation and accessible emergency washing facilities. Do not prescribe one glove material or respirator without the actual exposure assessment.

INITIAL FORMULATION APPROACHES FOR DIOCTYLAMINE

These complete compositions are exploratory laboratory starting points rather than validated industrial recipes. All percentages are by mass of the stated blend. The organic extraction phase and the oil-formulation example are separate systems. Actual assay, acid value and measured density must be included in development calculations.

EXAMPLE 1: DIOCTYLAMINE IN AN ORGANIC EXTRACTION-PHASE SCREEN

Components:

Dioctylamine: 5.00%
Suitable hydrocarbon diluent: 92.00%
Isodecanol phase modifier: 3.00%
Total: 100.00%

At ideal purity, 5% corresponds to approximately 0.207 mol of amine per kilogram of the organic blend. This is not a molarity value, which also requires the measured solution density. The aqueous feed is a separate test stream and is not included in this organic-phase formula. Fix its composition and the phase ratio when comparing results.

Evaluation criteria:

Initial solubility and phase stability
Distribution and selectivity for a defined target species
Disengagement time, emulsions and third-phase formation
Stripping and reuse behavior
Amine loss and contamination of the aqueous phase

Safety note: The diluent can change fire and aspiration hazards. Acid contact can release heat. Use contained equipment and collect all test phases.

EXAMPLE 2: DIOCTYLAMINE IN AN AMINE-FATTY-ACID OIL SCREEN

Components:

Compatible mineral base oil: 97.63%
Dioctylamine: 1.00%
Oleic acid: 1.17%
Compatible oil-soluble antioxidant: 0.20%
Total: 100.00%

The rounded acid quantity uses approximate molecular weights of 282.47 g/mol for oleic acid and 241.46 g/mol for the amine to approach a one-to-one molar balance. Correct for actual amine assay and fatty-acid acid value. This describes an ammonium-carboxylate formulation screen, not confirmed amide synthesis or proven rust prevention.

Evaluation criteria:

Acid and base balance and residual free amine
Clarity, sediment and low-temperature stability
Steel-panel corrosion response under a defined test
Compatibility with copper-containing parts and seals
Water separation and emulsion tendency

Safety note: Neutralization is exothermic and requires controlled addition and heat management. Salt formation does not automatically remove corrosive or environmental classification of the finished blend.

SIMILAR PRODUCTS AND ALTERNATIVES TO DIOCTYLAMINE

Compare structure, amine functionality, phase behavior and the complete hazard profile when selecting alternatives.

DIOCTYLAMINE AND BIS(2-ETHYLHEXYL)AMINE

The branched isomer shares the molecular formula but has different packing and physical behavior. Confirm its separate CAS identity and performance.

DIOCTYLAMINE AND OCTYLAMINE

The primary amine has one octyl chain and different reaction functionality. A molar substitution does not guarantee the same product distribution.

DIOCTYLAMINE AND TRIOCTYLAMINE

The tertiary amine has no N-H bond, so it cannot follow the same secondary-amine acylation route. It may offer a different extraction mechanism or formulation response.

DIOCTYLAMINE AND PREPARED AMINE DERIVATIVES

A characterized salt, amide or quaternary ammonium product may be preferable when the required function belongs to the derivative. Its safety and performance still require independent evaluation.

Validate substitution in the actual synthesis or application.

QUALITY CONTROL AND PURCHASING CRITERIA FOR DIOCTYLAMINE

Choose the specification for the intended reaction or separation rather than relying on the generic name and price.

Information to clarify before purchase:

CAS 1120-48-5 and EC 214-311-6
Linear-chain identity and branched-isomer limits
GC assay and titration method
Primary and tertiary amine profile
Water, color and relevant residuals
Packaging, conditioning and storage requirements
Current local SDS, TDS and batch COA
Regulatory coverage for the source and use

A COA reports batch acceptance or results, a TDS describes technical characteristics and an SDS addresses hazards and transport. A reagent grade may have research-use limitations and should not be assumed suitable for every commercial purpose.

Purification, assay, impurity limits, packaging and dangerous-goods logistics affect price. For current supply options and quotations, please contact Ataman Kimya.

STORAGE AND HANDLING OF DIOCTYLAMINE

Keep in closed compatible containers in a dry, ventilated area, separated from incompatible acids and oxidants. Published reagent information calls for inert-gas storage and protection from air and moisture, but the exact temperature and shelf life must match the supplied grade.

Low storage temperatures can cause solidification. Do not improvise heating or use the melting point alone to define a storage temperature. Confirm the allowed conditioning method and assess stored material for water, appearance, assay and amine profile.

Reviewed suppliers report UN 2735, amines, liquid, corrosive, n.o.s., Class 8, Packing Group III. Confirm the applicable shipment conditions and any environmental provisions. For the offered grade's storage and transport details, please contact Ataman Kimya.

Contain spills using a compatible inert absorbent and collect in identified waste containers. Prevent release to drains, soil and waterways, including contaminated wash and extraction liquids.

SAFETY INFORMATION OF DIOCTYLAMINE

Reviewed supplier SDS documents include H302, harmful if swallowed, H314, causes severe skin burns and eye damage, and H410, very toxic to aquatic life with long lasting effects. Other documents list H318 or different aquatic classifications. Use the current local classification for the delivered grade rather than combining every supplier's statements into one universal label.

Avoid skin and eye contact, mist inhalation and accidental ingestion. Use containment, splash protection, suitable gloves and ventilation. Eye exposure requires immediate prolonged rinsing and urgent medical attention. Remove contaminated clothing and rinse exposed skin promptly, obtaining medical help for corrosive exposure. After ingestion, rinse the mouth, do not induce vomiting and obtain urgent medical advice.

The liquid is combustible. Heated operations and hydrocarbon diluents can add fire risks. Fire response requires suitable extinguishing media, protection against combustion fumes and retention of contaminated firefighting water.

Manage residues and packaging through hazardous-waste procedures. Research and industrial intermediate uses do not establish cosmetic, food, pharmaceutical or biocidal approval. Regulatory declarations must concern the actual source and intended use.

SUPPLY OF DIOCTYLAMINE FROM ATAMAN KIMYA

Contact Ataman Kimya with the intended synthesis, extraction or formulation requirements to evaluate supply. Confirm the straight-chain identity, assay method, other-amine limits and current documents together with delivery conditions.

Useful quotation information includes:

Application and target market
Assay, water and other-amine limits
Isomer and structural requirements
Packaging, quantity and conditioning needs
Technical, safety and regulatory documentation

FREQUENTLY ASKED QUESTIONS ABOUT DIOCTYLAMINE

What is Dioctylamine?
It is a secondary amine with two straight octyl chains and a reactive N-H group.

What is its CAS number?
1120-48-5.

What is its EC number?
214-311-6.

What are its formula and molecular weight?
C16H35N and approximately 241.46 g/mol.

Is it identical to bis(2-ethylhexyl)amine?
No. That is a branched isomer with CAS 106-20-7.

How does it differ from trioctylamine?
Trioctylamine is tertiary and lacks an N-H bond.

Is the free base water-miscible?
Its water miscibility is very low. Salt formation can change phase behavior.

Why can a shipment contain solid material?
The reported melting range is approximately 13-16 °C.

Does warming automatically restore quality?
No. Use a confirmed conditioning procedure and check conformity.

Does one N-H guarantee only one alkylation?
No. A tertiary product can undergo further quaternization.

Are all its salts oil-soluble?
No. Counterion and formulation determine salt distribution and solubility.

Is the organic extraction phase always on top?
No. Diluent, loading and density of both phases determine the layer order.

Is low volatility a guarantee of safe handling?
No. The liquid is corrosive and generated mist remains hazardous.

What transport identity is reported?
Reviewed suppliers report UN 2735, Class 8, Packing Group III.

Does fatty-acid neutralization establish a safe rust preventive?
No. Residual free amine, finished-blend classification and corrosion performance need evaluation.

What documents should be requested?
Current TDS, local SDS, batch COA and source- and use-specific regulatory documents.

DIOCTYLAMINE - TECHNICAL SUMMARY

Dioctylamine is the straight-chain secondary amine identified by CAS 1120-48-5 and EC 214-311-6. Its formula is C16H35N and its molecular weight is approximately 241.46 g/mol.

The two octyl chains and secondary nitrogen combine hydrophobic character with acid-base and nucleophilic chemistry. Free-base, salt and derivative properties must be considered separately.

Assay method, primary and tertiary amines, water and isomer identity determine suitability for a specific process. Solidification near the reported melting range requires appropriate conditioning and quality checks.

Applications include specialty synthesis and selected separation and formulation studies. The two initial examples are mass-balanced experimental concepts, not guarantees of extraction or corrosion-control performance.

Corrosive and environmental hazards require suitable handling, transport and waste controls. Ataman Kimya can clarify the offered grade, current documents and supply conditions.

Dioctylamine can be sourced from ATAMAN KİMYA. For further information and supply inquiries about Dioctylamine, please contact ATAMAN KİMYA.