What is Trimethylstearylammonium Chloride?

It is octadecyltrimethylammonium chloride, also called steartrimonium chloride or STAC, with CAS 112-03-8 and molecular formula C₂₁H₄₆ClN. It is the specific C18 quaternary ammonium salt rather than a mixed C16/C18 blend.

What specifications should be confirmed before ordering?

Confirm active content or assay, free amine, chloride content, pH, appearance and the C18 homolog distribution. The batch analysis should state the test method because performance in asphalt emulsions and personal-care formulations depends on active content and impurities.

How should it be stored and handled?

Store in a cool, dry, ventilated area in tightly closed containers, away from heat, ignition sources and strong oxidizers. Use suitable PPE and follow the safety information for spill, disposal and first-aid procedures.

Why is the C18 homolog profile important?

This product is specifically octadecyltrimethylammonium chloride rather than a mixed C16/C18 quaternary blend. The C18 chain length affects conditioning, antistatic behavior, emulsification and melting range, so the homolog distribution should match the target formulation.

Trimethylstearylammonium Chloride CAS 112-03-8

Trimethylstearylammonium Chloride (STAC), CAS 112-03-8, is a cationic quaternary ammonium surfactant used as a hair-conditioning agent, textile antistat and asphalt emulsifier. Confirm the required active content, free amine and pH for the intended application.

CAS: 112-03-8
Synonyms: Steartrimonium chloride, STAC, Octadecyltrimethylammonium chloride, Stearyl trimethyl ammonium chloride, 1-Octadecanaminium N,N,N-trimethyl- chloride
Einecs: 203-929-1
Molecular Formula: C₂₁H₄₆ClN
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

Request a quote

Share:

Product Description

Trimethylstearylammonium Chloride, CAS 112-03-8, is octadecyltrimethylammonium chloride, a cationic quaternary ammonium surfactant also named steartrimonium chloride or STAC; the EC/EINECS number is 203-929-1.

Synonyms: Steartrimonium chloride; STAC; Octadecyltrimethylammonium chloride; Stearyl trimethyl ammonium chloride; 1-Octadecanaminium, N,N,N-trimethyl-, chloride.

CAS: 112-03-8.

Molecular formula: C₂₁H₄₆ClN.

Molecular weight: 348.05.

EC number: 203-929-1.

It is normally supplied as a white waxy solid that is easily soluble in water, with an active content of about 97-99%.

Typical properties include density of about 0.884 g/cm³ and flash point of about 180 °C.

It is used as a cationic surfactant, antistatic agent, hair-conditioning agent, asphalt emulsifier and disinfecting or sanitizing active ingredient.

It can also emulsify rubber and silicone oil systems and is used for textile-fiber antistatic treatment.

Confirm active content or assay, free amine, chloride content, pH, appearance and the C18 homolog distribution.

Store in a cool, dry, ventilated area in tightly closed containers away from heat, ignition sources, strong oxidizers and acids, and use suitable PPE.

Confirm the current product-specific specification.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA, or other product-specific files.

Regulated-use suitability must be confirmed separately with current product-specific documentation.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended use, required specification, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Trimethylstearylammonium Chloride?

A: It is octadecyltrimethylammonium chloride, also called steartrimonium chloride or STAC, with CAS 112-03-8 and molecular formula C₂₁H₄₆ClN. It is the specific C18 quaternary ammonium salt rather than a mixed C16/C18 blend.
Q:
What are its main applications?

A: It is used as a cationic surfactant, antistatic agent, hair-conditioning agent, asphalt emulsifier and disinfecting or sanitizing active ingredient. It can also emulsify rubber and silicone oil systems.
Q:
What specifications should be confirmed before ordering?

A: Confirm active content or assay, free amine, chloride content, pH, appearance and the C18 homolog distribution. The batch analysis should state the test method because performance in asphalt emulsions and personal-care formulations depends on active content and impurities.
Q:
How should it be stored and handled?

A: Store in a cool, dry, ventilated area in tightly closed containers, away from heat, ignition sources and strong oxidizers. Use suitable PPE and follow the safety information for spill, disposal and first-aid procedures.
Q:
Why is the C18 homolog profile important?

A: This product is specifically octadecyltrimethylammonium chloride rather than a mixed C16/C18 quaternary blend. The C18 chain length affects conditioning, antistatic behavior, emulsification and melting range, so the homolog distribution should match the target formulation.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

Current Language

Change Language