Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Physical Properties
- Appearance: White flaky/granular solid, odorless, no visible impurities.
- Melting Point: 100-105 °C (lit.), slight decomposition above 100 °C.
- Boiling Point: Decomposes before boiling, no definite boiling point.
- Solubility: Soluble in water and ethanol; slightly soluble in non-polar organic solvents.
- Density: ~0.98 g/cm3 (calculated, 25 °C).
- Optical Activity: No optical activity (racemic mixture).
- Moisture Absorption: Slightly moisture-sensitive, may agglomerate when absorbing moisture.
- Flash Point: ≥110 °C; pH: 7.0-9.0 (1% aqueous solution, 25 °C); moisture ≤3.50%.
Chemical Properties
- Chemical Category: Cationic surfactant, quaternary ammonium salt (also known as BTMS, 2231MS).
- Stability: Stable at ambient temperature/pressure (sealed), stable below 100 °C; incompatible with strong oxidants/acids; moisture-sensitive.
- Acid-Base Property: Neutral to weakly alkaline (pH 7.0-9.0 for 1% aqueous solution).
- Hydrolysis: Stable under neutral/weakly alkaline conditions; slow hydrolysis under strong acid.
- Photostability: Relatively stable to light, no obvious discoloration under UV exposure.
- Reactivity: Good surface activity, thickening/emulsifying/softening properties; antibacterial, non-flammable but combustible.
Chemical Structure
Structural formula: $$\mathrm{C_{26}H_{57}NO_4S}$$ (Canonical SMILES: CCCCCCCCCCCCCCCCCCCCC(N+)(C)(C)C.COS(=O)(=O)[O-])
（Complete structural diagram available on request）
Applications
- Personal care: Softener/conditioner for high-grade hair care products (conditioners, shampoos).
- Cosmetics: Moisturizer/conditioner for skin care products (hand creams, body lotions).
- Industry: Emulsifier, dispersant, antistatic agent for detergents, inks, lubricants.
- Textile: Fabric softener to improve softness and comfort.
- Research: Reagent for surfactant, antibacterial mechanism research.
Storage & Handling
- Storage: Sealed container, cool/dry/dark/ventilated; away from sunlight, heat, moisture, oxidants and acids.
- Temperature: 20–25 °C (long-term); avoid >100 °C; shelf life 12 months.
- Packaging: Sealed plastic/paper drum (25kg/89kg), moisture-proof.
- Precautions: Avoid dust inhalation and skin/eye contact; wear protective gear; keep away from ignition sources; dispose of waste properly.
Description
Docosyltrimethylammonium Methyl Sulphate (CAS: 81646-13-1) is a cationic surfactant (C??H??NO?S, MW 479.81), white flaky/granular solid (purity 78.0-82.0% GC), slightly moisture-sensitive. It has excellent thickening, emulsifying and softening properties, widely used in personal care, cosmetics, industry and textiles. Store sealed in cool dry conditions to ensure stability.
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