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ISONONYL ISONONANOATE is a branched-chain ester used as an ultra-light emollient in cosmetics.
Structure: Synthesized from branched-chain isononanol (C9 alcohol) and isononanoic acid (C9 acid).
Formula: C₁₈H₃₆O₂ (molecular weight ~284.5 g/mol).
Properties:
Silky, non-greasy feel; fast-absorbing.
Low viscosity, high spreadability.
Oxidative stability (resists rancidity).
Functions:
Improves texture in sunscreens, foundations, and serums.
Enhances pigment dispersion.
Reduces tackiness in silicone-free formulas.
Applications:
Key in high-end skincare/makeup for its "weightless" sensory profile.
ISONONYL ISONONANOATE is a synthetic branched-chain ester widely used in cosmetics and personal care formulations. Here are its key chemical characteristics:
Alcohol moiety: Isononanol (branched C₉H₁₉OH, e.g., 3,5,5-trimethylhexanol).
Acid moiety: Isononanoic acid (branched C₈H₁₇COOH, e.g., 7-methyloctanoic acid).
Ester linkage: Formed by condensation of the two.
Formula: Typically C₁₈H₃₆O₂ (varies slightly by isomer).
Texture: Lightweight, non-greasy silicone-alternative emollient.
Spreadability: Excellent due to low viscosity and high branching.
Stability: Resistant to oxidation (branched chains lack reactive sites).
Compatibility: Mixes well with oils, UV filters, and pigments.
Skincare: Serums, sunscreens, moisturizers (enhances sensory feel).
Makeup: Foundations, primers (improves blendability, reduces tackiness).
Haircare: Conditioners (adds slip without buildup).
INCI Name: Isononyl Isononanoate (global regulatory acceptance).
Replaces cyclomethicone in "silicone-free" claims.
Reduces whitening in SPF formulations.
Enhances water resistance.
Note: Its performance stems from branching in both chains, which prevents crystallization and delivers a smooth, dry finish.
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