Overview
Sterol isostearate is a lipid derivative formed by esterification of plant- or animal-derived sterols (e.g., phytosterols) with isostearic acid. It serves as a multifunctional ingredient in cosmetic formulations, offering texture enhancement and skin barrier support. Unlike conventional esters, its branched-chain structure provides unique solubility and stability advantages, making it suitable for high-performance formulations. The compound is favored for its biodegradability and compatibility with natural product standards.
Physical and Chemical Properties
Sterol isostearate exhibits a waxy consistency at room temperature, transitioning to a low-viscosity liquid when heated. Its branched isostearic acid moiety reduces crystallization tendencies, improving blendability in oils. Chemically, it demonstrates high oxidative stability due to sterol’s antioxidant properties. The ester bond is resistant to hydrolysis under neutral pH conditions, ensuring longevity in formulations. Its hydrophobic nature (logP >8) makes it ideal for oil-phase systems.
Main Applications
In cosmetics, sterol isostearate functions as an emollient and viscosity modifier in creams, sunscreens, and makeup. Its non-comedogenic properties suit sensitive skin formulations. Pharmaceuticals utilize it as an excipient in topical drug delivery systems, enhancing active ingredient penetration. Industrial applications include biodegradable lubricants and plasticizers, where its thermal stability is advantageous.
Safety and Storage
Sterol isostearate is classified as low hazard under standard safety assessments (e.g., EWG Skin Deep). No significant ecotoxicity has been reported, but proper disposal procedures should be followed. Store in sealed containers at <30°C to prevent oxidation. Incompatible with strong acids/bases—avoid reactive environments. Use PPE (gloves, goggles) during bulk handling to minimize contact.
B2B Procurement Guide
B2B buyers should prioritize suppliers offering technical datasheets with sterol composition analysis (e.g., β-sitosterol content). Batch-to-batch consistency is critical for formulation stability. Request certificates for vegan/non-GMO status if required. MOQs typically start at 25 kg; sample testing is recommended. Leading producers are located in Europe (Germany, France) and Asia (China, India), with pricing influenced by raw material trends.
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