Description

Trimethyl(Octadecyl)Ammonium Methyl Sulphate is a high-purity quaternary ammonium salt, also known as stearyltrimethylammonium methyl sulfate. This compound is valued for its excellent cationic surfactant properties, providing superior emulsification, antistatic, and conditioning effects. It is primarily utilized by manufacturers in the personal care, textile, and industrial chemical sectors for formulating hair conditioners, fabric softeners, and specialty surfactants.

Application

• Primary surfactant and conditioning agent in hair care products such as shampoos, conditioners, and hair masks.
• Key ingredient in fabric softeners and textile auxiliaries to impart softness and reduce static cling.
• Emulsifier and antistatic agent in the production of industrial and institutional cleaning formulations.
• Used as a phase transfer catalyst in specific organic synthesis reactions.
• Component in personal care rinse-off products for its excellent substantivity to hair and skin.
• Raw material for synthesizing other specialty quaternary ammonium compounds.

Basic Information

Product Name	Trimethyl(Octadecyl)Ammonium Methyl Sulphate
CAS No.	18684-11-2
Molecular Formula	C22H49NO4S
Molecular Weight	423.70 g/mol
Synonyms	Stearyltrimethylammonium methyl sulfate; Octadecyltrimethylammonium methyl sulfate; STAMS; Trimethylstearylammonium methyl sulfate; N,N,N-Trimethyl-1-octadecanaminium methyl sulfate; C18-TMA methyl sulfate; Arquad 18-35; Arosurf TA-100
EINECS	242-500-5

Quality Control

Our Trimethyl(Octadecyl)Ammonium Methyl Sulphate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets the required specifications for identity, purity, and performance. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed-upon standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to structure
Assay (by Titration)	≥ 95.0 %
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.