Octinoxate

CAS# 5466-77-3

Octinoxate (Ethylhexyl Methoxycinnamate) is a high-purity, FDA-approved cinnamate ester and a primary organic UV-B filter. Known by CAS# 5466-77-3, it is a key active ingredient used globally in cosmetic formulations to effectively absorb UV-B radiation, preventing sunburn and minimizing DNA photodamage in skin cells.

Applications of Octinoxate

Octinoxate is indispensable in the cosmetics and personal care industry, serving as the leading chemical UV-B absorber. It is widely used in formulating premium sunscreen lotions, creams, lip balms, and daily moisturizers that require strong sun protection factors (SPF). Its oil-soluble nature allows seamless integration into diverse emulsions, often combined with water-resistant carriers to ensure optimal localization on the epidermis and broad-spectrum stability in final consumer products.

Specifications & Physical Properties

Appearance: pale yellow, liquid
Color Hazen: 70 max.
Odor: slight characteristic
Identification by IR, USP: matches reference spectrum
Identification by GC, USP: matches reference retention time
UV Specific extinction(E1% 1cm, 310nm, ethanol), USP: 850 min.
Specific Gravity at 25℃, USP: 1.009±0.004
Refractive Index at 20℃, USP: 1.545±0.003
Peroxide Value: 1.0% max.
Acidity (0.1N NaOH): 0.8% max.
GC Purity, USP: Purity: 99.0% min. / Single Impurity: 0.5% max. / Total Impurities: 2.0% max.
Assay, USP: 95.0 – 105.0%

Packaging

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