Description

Stearyltrimonium Methosulfate is a high-purity quaternary ammonium compound widely recognized for its excellent conditioning and antistatic properties. This cationic surfactant is essential for formulators seeking to enhance the performance and feel of personal care and hair treatment products. It is a key ingredient for manufacturers in the cosmetics, hair care, and textile softening industries, where reliable quality and consistent supply are paramount.

Application

• Hair Conditioners & Rinses: Primary conditioning agent providing excellent detangling, softness, and manageability.
• Leave-in Hair Treatments: Imparts long-lasting antistatic and conditioning effects without heavy buildup.
• Skin Creams & Lotions: Used as an emulsifier and conditioning agent to improve skin feel and texture.
• Textile Softeners: Key cationic component in fabric softener formulations for household and industrial use.
• Anti-frizz & Styling Products: Helps to control frizz and improve hair alignment for smoother styles.
• Industrial Surfactant: Acts as a cationic emulsifier and antistatic agent in various industrial processes.

Basic Information

Product Name	Stearyltrimonium Methosulfate
CAS No.	39336-75-9
Molecular Formula	C22H49NO4S
Molecular Weight	423.70 g/mol
Synonyms	Steartrimonium Methosulfate; Octadecyltrimethylammonium Methosulfate; STMS; Quaternium-18 Methosulfate; Trimethyloctadecylammonium Methyl Sulfate; Cetyltrimethylammonium Methosulfate (common trade name reference); Adogen® 462 (trade name); Arquad® 18-50 (trade name)
EINECS	254-448-0

Quality Control

Our Stearyltrimonium Methosulfate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, moisture content, and residue specifications. Our quality commitment aligns with GMP principles and relevant cosmetic ingredient standards to support your formulation and regulatory needs.

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 product 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 (HPLC)	≥ 95.0 %
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
pH (5% solution)	4.0 - 7.0

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