BTMS Behentrimonium Methosulfate Cationic Surfactant CAS 81646-13-1

BTMS (Behentrimonium Methosulfate) – High-Performance Cationic Conditioning Emulsifier
Product Overview
BTMS (Behentrimonium Methosulfate) is a plant-derived (from rapeseed oil) C22 long-chain cationic quaternary ammonium compound that integrates multiple functions including high-efficiency emulsification, deep conditioning, antistatic properties, and thickening stabilization. Compared to traditional C18 quats, its longer hydrophobic carbon chain provides superior adsorption and deposition capabilities, forming a lightweight, non-heavy protective film on hair and skin surfaces to deliver exceptional smoothness and manageability. This product, in the form of white to pale yellow pellets with high active content (≥80%), is an ideal core ingredient for formulating premium hair care and skin care products.

Core Efficacy and Mechanism of Action
1. Superior Deposition and Deep Conditioning

Mechanism: Strong cationic properties enable efficient adsorption onto negatively charged hair cuticles and skin surfaces, while the C22 long chain provides excellent hydrophobic binding.

Effect: Significantly improves wet and dry combability, reducing combing resistance by up to 70%; imparts hair with extraordinary softness and shine, effectively controlling frizz and flyaways.

2. Efficient Primary Emulsifier and Stabilizer

Mechanism: Acts as a primary emulsifier to form stable oil-in-water (O/W) emulsions and possesses inherent thickening properties.

Effect: Simplifies formulations, often eliminating the need for additional cationic polymers or thickeners; enhances product texture and stability.

3. Enhanced Mildness and Skin-Friendliness

Mechanism: Its vegetable origin and molecular structure result in lower irritation potential compared to conventional quaternary ammonium salts.

Effect: Suitable for sensitive scalp formulations; does not disrupt the skin's natural lipid barrier, aiding in the delivery of other active ingredients.

4. Synergistic Effects

With Silicones & Oils: Enhances the uniform deposition of dimethicone and natural oils, boosting moisturizing and softening effects.

With Proteins: Promotes even adhesion of hydrolyzed proteins to hair shafts, enhancing repair efficacy.

Technical Specifications
Parameter    Specification
INCI Name    Behentrimonium Methosulfate
Appearance    White to pale yellowish pellet
Active Content (Quaternary %)    ≥ 80.0%
Free Amine    ≤ 1.5%
pH (1% solution)    5.0 – 9.0
Recommended Concentration    Conditioners: 1.0-10.0%; Shampoos: 0.1-0.5%; Perm Solutions: 1.0-4.0%

Applications & Usage Recommendations
Hair Conditioners & Masks (1-10%): Core conditioning agent providing slip, detangling, and softness.

Moisturizing Creams & Lotions (1-3%): Serves as an emulsifier and conditioner, imparting a non-greasy, silky afterfeel.

Shampoos (0.1-0.5%): Enhances combability and reduces static, often used in "2-in-1" formulas.

Perm & Color Care Products (1-4%): Protects hair during chemical processes and improves dye uptake/retention.

Processing Guidance: Disperse in the water phase at 70-75°C until fully melted and clear. Compatible with most anionic systems, but long-term stability should be verified.

Key Advantages Summary
Dual Function: Combines emulsification and conditioning in one ingredient, streamlining formulations.

Proven Performance: Delivers salon-quality conditioning with reduced formulation complexity.

Consumer Appeal: Meets market demand for "clean-feel" conditioning without heaviness or buildup.

Regulatory & Safety: Widely approved for global cosmetic use (CIR assessed); recommended usage within safe concentrations (typically 0.5-2% in leave-on products).

Packaging & Storage: 25 kg/bag. Store in a cool, dry, and well-ventilated place.

Performance:

Effectively improve the combability of wet and dry hair, enhance softness, and have good antistatic properties.

Dry and wet combability test for mildly damaged hair

Packaging and storage:

20kg/paper drum

Storage: Keep in a ventilated, cool place.