What is Octadecyl Dimethyl Amine CAS 124-28-7 used for?

Octadecyl Dimethyl Amine is used as a tertiary fatty amine intermediate for cationic surfactants, quaternary ammonium compounds, textile auxiliaries, mining reagents, water treatment additives, and related industrial formulations.

What downstream products can be prepared from Octadecyl Dimethyl Amine?

Octadecyl Dimethyl Amine is a key intermediate for synthesizing quaternary ammonium compounds such as cetrimonium and steartrimonium chloride, as well as amine oxides, betaines, and other cationic surfactants used in personal care, textile softening, and industrial processing applications.

In which industries can this product be applied?

It is commonly applied in textile auxiliaries, mining chemicals, surface treatment systems, and the manufacture of cationic functional chemicals.

What quality indicators should buyers verify when sourcing Octadecyl Dimethyl Amine?

Key quality indicators include amine value (mg KOH/g), tertiary amine content (≥97%), moisture content, and appearance. Buyers should confirm the C18 alkyl chain distribution and request COA documentation for lot-specific amine value and purity specifications before procurement.

How does Octadecyl Dimethyl Amine differ from primary fatty amines?

Unlike primary fatty amines (RNH₂), Octadecyl Dimethyl Amine has two methyl groups on the nitrogen atom, making it a tertiary amine with lower reactivity toward electrophiles. This structure is specifically designed for preparing quaternary ammonium salts via alkylation, where the tertiary nitrogen forms a stable quaternary cation without competing side reactions.

How should Octadecyl Dimethyl Amine be stored and what affects its stability?

The material should be stored in sealed containers in a cool, dry environment away from moisture and CO₂ exposure, as tertiary amines can absorb atmospheric CO₂ over time. Storage temperatures should avoid prolonged exposure above 40°C. Refer to the applicable SDS for detailed handling and disposal guidance.

Octadecyl Dimethyl Amine CAS 124-28-7

Octadecyl Dimethyl Amine CAS 124-28-7, also known as Stearyl Dimethyl Amine, N,N-Dimethyloctadecylamine, or DMA-18 (99% purity), is a tertiary fatty amine supplied as an industrial intermediate for cationic surfactants, quaternary ammonium compounds, amine derivatives, textile auxiliaries, mining chemicals, water treatment systems, and related specialty formulations. COA, SDS, and TDS are available upon request. For bulk orders, customized packaging, and export logistics, please contact our sales team.

CAS: 124-28-7
Synonyms: Stearyl Dimethyl Amine, N,N-Dimethyloctadecylamine, Dimethyloctadecylamine, DMA-18
Einecs: 204-171-9
Molecular Formula: C20H43N
Grade: 99%
Package: Standard industrial packaging

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Product Description

1 Product Overview

2 Product Information / Specifications

3 Physical & Chemical Properties

Product Overview

Octadecyl Dimethyl Amine is supplied as a specialty fatty amine used primarily as an industrial intermediate and functional raw material. Its long alkyl chain and tertiary amine structure make it suitable for the preparation of quaternary ammonium compounds, amine derivatives, and cationic surfactant systems used across textile, mining, water treatment, and related industrial sectors.

This product is commonly applied where fatty amine chemistry is required for further processing, system modification, or performance-oriented formulation development. For industrial supply, packaging and supporting documentation may vary according to grade and shipment requirements.

Product Information / Specifications

Product Name	Octadecyl Dimethyl Amine
CAS Number	124-28-7
Synonyms	Stearyl Dimethyl Amine; N,N-Dimethyloctadecylamine
Product Identity	Tertiary fatty amine
Primary Role	Industrial intermediate for cationic surfactants and related amine derivatives
Supply Form	Supplied according to industrial grade requirements
Documentation	COA, TDS, and SDS may be provided according to the supplied grade

Physical & Chemical Properties

Appearance	White to pale yellow solid, flakes, pastilles, or wax-like material depending on temperature and grade
Chemical Class	Long-chain tertiary aliphatic amine
Solubility	Generally insoluble or poorly soluble in water; used in processed or formulated systems according to application requirements
Processing Character	Typically handled as a reactive amine intermediate for downstream conversion or industrial formulation use

Applications

Intermediate for cationic surfactants and quaternary ammonium compounds.
Raw material for textile auxiliaries, softeners, antistatic agents, and related specialty chemical systems.
Used in mining, flotation, surface treatment, water treatment, and industrial formulation development where long-chain tertiary amine chemistry is required.

Packaging

Packaging may be arranged in standard industrial formats such as drums, bags, or other suitable containers depending on the supplied grade and delivery requirements.

For bulk or customized packaging requirements, please confirm the grade, quantity, destination, and documentation needs before shipment.

Storage Conditions

Store in a sealed container in a cool, dry, and well-ventilated place.
Keep away from excessive heat, moisture, strong oxidants, and incompatible materials.
Follow the applicable SDS and local handling requirements for industrial chemical storage.

Safety Precautions

Use appropriate personal protective equipment during handling.
Avoid direct contact with skin, eyes, and clothing.
Ensure adequate ventilation and follow plant safety procedures for amine intermediates.
Refer to the product SDS before use, storage, transport, or disposal.

FAQ - Technical & Supply Chain

Q:
What is Octadecyl Dimethyl Amine CAS 124-28-7 used for?

A: Octadecyl Dimethyl Amine is used as a tertiary fatty amine intermediate for cationic surfactants, quaternary ammonium compounds, textile auxiliaries, mining reagents, water treatment additives, and related industrial formulations.
Q:
What downstream products can be prepared from Octadecyl Dimethyl Amine?

A: Octadecyl Dimethyl Amine is a key intermediate for synthesizing quaternary ammonium compounds such as cetrimonium and steartrimonium chloride, as well as amine oxides, betaines, and other cationic surfactants used in personal care, textile softening, and industrial processing applications.
Q:
In which industries can this product be applied?

A: It is commonly applied in textile auxiliaries, mining chemicals, surface treatment systems, and the manufacture of cationic functional chemicals.
Q:
What quality indicators should buyers verify when sourcing Octadecyl Dimethyl Amine?

A: Key quality indicators include amine value (mg KOH/g), tertiary amine content (≥97%), moisture content, and appearance. Buyers should confirm the C18 alkyl chain distribution and request COA documentation for lot-specific amine value and purity specifications before procurement.
Q:
How does Octadecyl Dimethyl Amine differ from primary fatty amines?

A: Unlike primary fatty amines (RNH₂), Octadecyl Dimethyl Amine has two methyl groups on the nitrogen atom, making it a tertiary amine with lower reactivity toward electrophiles. This structure is specifically designed for preparing quaternary ammonium salts via alkylation, where the tertiary nitrogen forms a stable quaternary cation without competing side reactions.
Q:
How should Octadecyl Dimethyl Amine be stored and what affects its stability?

A: The material should be stored in sealed containers in a cool, dry environment away from moisture and CO₂ exposure, as tertiary amines can absorb atmospheric CO₂ over time. Storage temperatures should avoid prolonged exposure above 40°C. Refer to the applicable SDS for detailed handling and disposal guidance.

Documents

Documents and Product Support

For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

COA for batch-based quality reference
TDS for key physical and chemical information
SDS / MSDS for handling, storage, and safety reference
Packing information for sample, trial, and bulk orders
Technical communication based on application and specification requirements

Quotation

Information to Confirm Before Quotation

Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

Product name and CAS number
Application or intended end use
Required purity, grade, or specification
Sample quantity, trial order, or bulk demand
Preferred packing form or net weight
Destination country or port
Required documents or compliance expectations

Storage & Handling

Packaging, Storage, and Handling Notes

Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

Supply Support

Sample, Bulk Order and Repeat Supply Support

Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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Product Categories

Tags:

Amine Intermediate Cationic Surfactant Intermediate Quaternary Ammonium Intermediate Tertiary Amine

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