Stearamidopropyl Dimethylamine S-18 CAS 7651-02-7

Stearamidopropyl Dimethylamine S-18 – Cationic Surfactant and Emulsifier for Hair and Skin Care

Basic Information

• Product Name: S-18

• INCI Name: Stearamidopropyl Dimethylamine

• CAS Number: 7651-02-7

• Function: Thickener, Conditioner, Anti-static Agent, Viscosity Modifier, Stabilizer

• Source: Stearic acid (non-palm, sustainable source)

Overview
Stearamidopropyl dimethylamine S-18 is a multifunctional cationic surfactant designed for use in hair and skin care formulations. It serves as a conditioning agent, anti-static agent, and emulsifier, providing superior performance in rinse-off and leave-on products. Its unique chemistry offers excellent wet and dry combability, reduced frizz, and enhanced volume without build-up on hair. In skin care, it functions as an auxiliary emulsifier and imparts a pleasant, soft emollient feel.

Key Benefits

• Superior conditioning: Improves wet and dry combability, reduces frizz and flyaways.

• Anti-static: Minimizes static charge, making hair more manageable.

• Volume enhancement: Adds body and volume to hair without weighing it down.

• Non-build-up: Does not accumulate on hair, maintaining a clean feel.

• Emulsification: Provides reliable emulsification of fatty alcohols, simplifying formulation.

• Sustainable and palm-free: Derived from non-palm stearic acid, offering an eco-friendly profile.

• Excellent performance: Effective at low usage levels, cost-efficient.

Applications

• Rinse-off conditioners: 0.5–1.0%

• Leave-in conditioners: 1.0–2.0%

• Cream conditioners: 1.0–3.0%

• Conditioning masks: 2.0–4.0%

• 2-in-1 shampoos: 0.5–1.0%

• Skin creams and lotions: As an auxiliary emulsifier and conditioner.

• Ethnic hair care: Particularly effective for curly, coarse, or textured hair types.

Recommended Use
Typical usage levels range from 0.5% to 4.0% depending on the desired conditioning effect and product type. For optimal performance, combine with fatty alcohols (e.g., cetearyl alcohol) and other cationic or nonionic ingredients. Adjust pH to slightly acidic (4–6) to enhance conditioning properties.

Handling and Storage

• Store in a cool, dry place, away from direct sunlight and moisture.

• Keep containers tightly sealed to prevent contamination.

• Use appropriate personal protective equipment (gloves, safety goggles) when handling.

• Shelf life: typically 24 months under recommended storage conditions.

Packaging
Available in 25 kg, 50 kg, and 200 kg drums, or custom packaging upon request.

Quality Assurance
Each batch is tested for active content, pH, and performance characteristics to ensure consistent quality.