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    Related: Sunscreen Ingredient Homosalate
    • Octinoxate (OMC) CAS 5466-77-3

    Octinoxate (OMC) CAS 5466-77-3

    Octinoxate (OMC), also called ethylhexyl methoxycinnamate or 2-ethylhexyl 4-methoxycinnamate, CAS 5466-77-3, is an oil-soluble organic UVB absorber supplied for sunscreen and personal care formulations. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 5466-77-3
    • Synonyms: Octinoxate; 2-Ethylhexyl 4-methoxycinnamate; Ethylhexyl Methoxycinnamate
    • Einecs: 226-775-7
    • Molecular Formula: C18H26O3
    • Grade: Formulation / cosmetic raw material grade
    • Package: Standard export packaging
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    Product Description

    Octinoxate (OMC) CAS 5466-77-3 is an oil-soluble organic UVB absorber with EINECS 226-775-7 and molecular formula C18H26O3.

    Synonyms: Ethylhexyl methoxycinnamate; 2-Ethylhexyl 4-methoxycinnamate; Octyl methoxycinnamate; OMC.

    CAS: 5466-77-3.

    Molecular formula: C18H26O3.

    It is practically insoluble in water and is used as an oil-soluble liquid UVB filter.

    It is also called ethylhexyl methoxycinnamate, OMC, or 2-ethylhexyl 4-methoxycinnamate.

    It is mainly used in sunscreens, sun care, lip care, and other personal care products.

    It is often combined with UVA filters to build broader spectrum protection.

    It is primarily a UVB filter, while avobenzone is primarily a UVA filter.

    In many sunscreen systems they are combined with other filters and stabilizers rather than treated as equivalent replacements.

    Confirm appearance, assay, color, specific gravity, refractive index, acidity or acid value, and related impurities or residual solvent.

    Confirm regional concentration limits and product category before formulation.

    Store in tightly closed, light-protected containers in a cool, dry, well-ventilated area away from heat and strong oxidizers.

    Use appropriate PPE and prevent spills or contamination.

    Confirm packaging suitable for the liquid supply form and order quantity, and follow the current SDS.

    Every batch is checked for appearance, assay, color, specific gravity, refractive index, acidity, and related impurities, with COA/TDS/SDS supplied per grade.

    Confirm assay, appearance, color, packaging, and grade as required.

    The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

    For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Octyl 4-Methoxycinnamate CAS 5466-77-3?

      A: Octyl 4-Methoxycinnamate is the INCI-adjacent name for octinoxate, also called ethylhexyl methoxycinnamate, OMC, or 2-ethylhexyl 4-methoxycinnamate. It has CAS 5466-77-3, EC 226-775-7, molecular formula C18H26O3, and molecular weight 290.40.
    • Q:

      Why is Octyl 4-Methoxycinnamate used in sunscreen formulations?

      A: It is an oil-soluble organic UVB absorber that helps protect the skin from UVB radiation. It is commonly used in sunscreens, sun care, lip care, and other personal care products, often together with UVA filters to build broader spectrum protection.
    • Q:

      Is Octyl 4-Methoxycinnamate water soluble?

      A: No. It is practically insoluble in water and is used as an oil-soluble liquid UVB filter. This makes it suitable for oil-phase incorporation and water-resistant sunscreen systems, but it should be evaluated for compatibility in the target emulsion.
    • Q:

      How is Octinoxate different from UVA filters such as avobenzone?

      A: Octinoxate is primarily a UVB filter, while avobenzone is primarily a UVA filter. In many sunscreen systems they are combined with other filters and stabilizers to achieve broad-spectrum UV coverage, rather than being treated as equivalent replacements.
    • Q:

      What concentration limits should be confirmed for sunscreen use?

      A: Limits depend on the region and product category: US OTC sunscreen use is commonly limited to 7.5%, while EU cosmetic regulation generally permits up to 10% under Annex VI. Confirm the current local regulation, product type, dosage, and combined-filter exposure limits before formulation.

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