Behentrimonium Methosulfate 50%

CAS Number:

81646-13-1 (for the active Behentrimonium Methosulfate)

Molecular Weight

~479.8 g/mol (for the active ingredient)

Chemical / INCI Name:

Behentrimonium Methosulfate (and) Cetearyl Alcohol

Molecular Formula:

C26H57NO4S (for the active ingredient)

Other Names:

BTMS 50, Behenyltrimethylammonium Methosulfate blend, C22-Quat blend .

Uses:

Behentrimonium Methosulfate 50% (BTMS 50) is a self-emulsifying cationic base specifically designed for hair and skin care applications. It consists of 50% Behentrimonium Methosulfate (a quaternary ammonium compound) blended with 50% Cetearyl Alcohol (a fatty alcohol mixture). This specific ratio creates a convenient, complete conditioning and emulsifying system .

· Hair Care: The primary use is as a premium conditioning base in rinse-off conditioners, hair masks, leave-in treatments, and conditioning shampoos. It provides excellent detangling, antistatic properties (frizz reduction), and leaves hair feeling soft, silky, and manageable without buildup .

· Skin Care: Functions as an emulsifier and emollient in creams, lotions, and body butters, imparting a smooth, velvety after-feel to the skin .

· Advantage over BTMS 80: The 50:50 ratio with cetearyl alcohol offers enhanced emulsifying properties and requires less additional fatty alcohol to achieve desired consistency, making it a complete "self-emulsifying" base .

Origin:

BTMS 50 is a vegetable-derived, semi-synthetic compound. It is manufactured by reacting behenyl alcohol (derived from rapeseed or other vegetable oils) with dimethyl sulfate, then blending the resulting Behentrimonium Methosulfate with an equal amount of cetearyl alcohol (also plant-derived).

What does  Behentrimonium Methosulfate 50% do in a formulation?

• Self-Emulsifying Base: Creates stable oil-in-water (O/W) emulsions without additional emulsifiers .
• Hair Conditioning Agent: Provides slip, detangling, and softness .
• Antistatic Agent: Reduces static electricity and frizz .
• Emollient & Skin Conditioning Agent: Softens and smooths the skin .
• Viscosity Modifier: Helps build and stabilize the thickness of formulations .

Safety Profile:

· General Hazard Classification: Considered safe, mild, and non-irritating for use in cosmetics. It is significantly gentler than traditional quats and is a preferred choice for "natural," "eco-friendly," and "sulfate-free" formulations .

· Biodegradability: Readily biodegradable and environmentally friendly .

· Irritation & Sensitization: Generally regarded as non-irritating and non-sensitizing to skin and eyes at typical use concentrations (2-6%). The high fatty alcohol content (50%) further buffers any potential irritation .

· Toxicity: Low acute toxicity. Not classified as hazardous under normal use conditions .

· Regulatory Status: Approved for use in cosmetics worldwide. Compliant with COSMOS, NaTrue, and Ecocert standards for natural and organic cosmetics .

Technical profile: