Overview
Cetearyl alcohol is a mixture of cetyl alcohol (C16) and stearyl alcohol (C18), classified as a fatty alcohol. It is derived from natural sources like coconut or palm oil, though synthetic versions exist. Primarily used in personal care formulations, it acts as a co-emulsifier and viscosity modifier. Its dual-chain structure provides unique benefits: the cetyl component offers emollience, while stearyl contributes to stability. This combination makes it a staple in creams, ointments, and hair conditioners, where texture and shelf life are critical.
Physical and Chemical Properties
Cetearyl alcohol appears as white, odorless flakes or solid blocks with a mild characteristic wax-like smell. It is hydrophobic but can form stable emulsions when combined with surfactants. The blend typically contains 30–50% cetyl and 50–70% stearyl alcohol. Key chemical properties include its non-ionic nature, making it compatible with most cosmetic ingredients. It has a low melting point (48–56°C), which facilitates easy incorporation into hot-process formulations. Its insolubility in water necessitates melting or dispersing in oil phases during production.
Main Applications
In cosmetics, cetearyl alcohol is a workhorse ingredient. It thickens lotions, stabilizes emulsions, and imparts a smooth skin feel. Pharmaceutical applications include ointment bases and topical drug delivery systems due to its inertness and safety profile. Beyond personal care, it serves as a lubricant in industrial processes and a texturizer in food-grade coatings. Its versatility stems from its ability to modify rheology without altering pH or active ingredient efficacy.
Safety and Storage
Cetearyl alcohol is generally recognized as safe (GRAS) by regulatory bodies like the FDA and EFSA. However, dust exposure during handling may cause respiratory irritation, requiring proper ventilation or PPE. Storage recommendations include airtight containers to prevent oxidation. Stability testing shows minimal degradation under standard conditions (25°C, 60% RH). Suppliers often add antioxidants like BHT to extend shelf life. For B2B buyers, verifying absence of contaminants (e.g., heavy metals) is advised.
B2B Procurement Guide
When sourcing cetearyl alcohol, prioritize suppliers with ISO 22716 or GMP certification for consistent quality. Technical specifications to review include iodine value (indicates unsaturation), saponification value, and free fatty acid content. Bulk pricing favors metric-ton purchases, with discounts for long-term contracts. Sustainable sourcing is increasingly important—look for RSPO-certified (Roundtable on Sustainable Palm Oil) options. Sample testing for melting range and purity is recommended before large orders.
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