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    Related: Vitamin C Derivative Ascorbyl Glucoside Ethyl Ascorbic Acid
    • Ascorbyl Palmitate CAS 137-66-6

    Ascorbyl Palmitate CAS 137-66-6

    Ascorbyl Palmitate (CAS 137-66-6) is a highly stable, fat-soluble ester of Vitamin C utilizing its lipophilic nature to protect fats and oils from oxidation in food and cosmetic formulations. Chemically identified as L-Ascorbyl 6-palmitate, this white to yellowish powder acts as a potent antioxidant that synergistically functions with Vitamin E to extend the shelf life of lipid-containing products. Unlike water-soluble ascorbic acid, this Amphipathic Vitamin C derivative can penetrate cell membranes, making it extensively integrated into anti-aging skincare for collagen stimulation and skin brightening, as well as into infant formulas and margarine as a preservative (E304). We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific purity standards (e.g., Food Grade FCC / USP / BP). Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

    • CAS: 137-66-6
    • Synonyms: L-Ascorbyl palmitate, Vitamin C palmitate, Palmitoyl ascorbic acid, 6-O-Palmitoyl-L-ascorbic acid, E304 antioxidant
    • Einecs: 205-305-4
    • Molecular Formula: C22H38O7
    • Grade: Food Grade (FCC/E304) / Cosmetic Grade / Pharma Grade (USP/BP)
    • Package: 10kg/Carton, 25kg/Fiber Drum, or 500g/Aluminum Foil Bag (Vacuum packed)
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    Product Description

    Ascorbyl Palmitate is a highly effective, fat-soluble form of Vitamin C (Ascorbic Acid), produced by the esterification of ascorbic acid with palmitic acid. Unlike water-soluble Vitamin C, Ascorbyl Palmitate is amphipathic, meaning it can penetrate the skin barrier and cell membranes more effectively.

    As a high-performance antioxidant, it is widely used in the food industry to extend the shelf life of oils and fats by preventing oxidation and rancidity. In the cosmetic industry, it is valued for its stability and ability to stimulate collagen production, brighten skin tone, and scavenge free radicals. Our product is manufactured under strict GMP conditions, ensuring high purity, low heavy metal content, and excellent thermal stability.

    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    The following specifications are based on our standard export quality (compliant with FCC/USP/BP standards):

    Test ItemSpecification
    AppearanceWhite to yellowish powder
    OdorSlight characteristic citrus odor
    Assay (Purity)98.0% – 100.5% (Dry Basis)
    Melting Point115.0°C – 118.0°C
    Specific Rotation [α]25/D+21.0° to +24.0°
    Loss on Drying≤ 2.0%
    Residue on Ignition≤ 0.1%
    Heavy Metals (Pb)≤ 10 mg/kg (ppm)
    Arsenic (As)≤ 3 mg/kg (ppm)
    Lead (Pb)≤ 2 mg/kg (ppm)
    SolubilityInsoluble in water; Soluble in ethanol and vegetable oils

    Applications

    Ascorbyl Palmitate CAS 137-66-6 is a versatile ingredient used across multiple sectors:

    1. Food & Beverage Industry (Additives):
      • Antioxidant: Used in fats, oils, margarine, and mayonnaise to prevent oxidation (rancidity) and extend shelf life.
      • Color Protection: Protects beta-carotene and other natural pigments in beverages and dairy products.
      • Bakery: Used in instant noodles and baked goods containing fats.
    2. Cosmetics & Skincare:
      • Anti-Aging: Stimulates collagen synthesis and reduces fine lines.
      • Whitening: Inhibits tyrosinase activity to reduce pigmentation and dark spots.
      • Stability: Unlike pure Vitamin C, Ascorbyl Palmitate is stable in creams and lotions and does not oxidize easily (turning brown).
      • Sun Care: enhancing the efficacy of sunscreens by neutralizing UV-induced free radicals.
    3. Pharmaceuticals & Health Supplements:
      • Used as a source of Vitamin C in lipid-based formulations and soft gel capsules.

    For water-phase vitamin C derivative options, see Ascorbyl Glucoside and Ethyl Ascorbic Acid.

    Storage Conditions

    • Environment: Store in a cool, dry, and dark place.
    • Temperature: Recommended storage temperature is below 25°C.
    • Protection: The product is sensitive to light and humidity. Keep the original packaging tightly sealed. Vacuum packing is recommended for long-term storage.
    • Shelf Life: 24 months from the date of manufacture under proper storage conditions.

    Safety Precautions

    • Regulatory Status: Generally Recognized As Safe (GRAS) for food use in many countries (E number: E304).
    • Handling: Wear dust masks and safety glasses to avoid inhaling fine powder.
    • Skin/Eye Contact: Non-irritating to skin in normal handling. If it enters eyes, rinse thoroughly with water.
    • Ingestion: Safe for consumption within regulated food additive limits.
    • Flammability: As with most organic powders, avoid creating dust clouds near ignition sources.

    FAQ - Technical & Supply Chain

    • Q:

      What is Ascorbyl Palmitate CAS 137-66-6?

      A: Ascorbyl Palmitate CAS 137-66-6 is the palmitic acid ester of ascorbic acid, with the formula C22H38O7 and molecular weight 414.53 g/mol. It is a fat-soluble form of vitamin C also called vitamin C palmitate.
    • Q:

      How does Ascorbyl Palmitate differ from ascorbic acid?

      A: Ascorbic acid is water-soluble, while ascorbyl palmitate is lipophilic and more compatible with oils, fats and anhydrous or emulsion-based cosmetic systems. This property makes it useful as an oil-phase antioxidant and vitamin C derivative.
    • Q:

      What are the main food applications of Ascorbyl Palmitate?

      A: As antioxidant E304, it is used in oils, fats, margarine, shortenings and lipid-rich food products to help delay oxidative rancidity. It can be used alone or with other antioxidants depending on the food system.
    • Q:

      What cosmetic applications are relevant?

      A: It is used in creams, lotions, serums, lip products and other skin-care formulations as an oil-soluble antioxidant or vitamin C derivative. Product benefits should be validated for the specific formula rather than implied from the raw ingredient alone.
    • Q:

      What are typical quality parameters for Ascorbyl Palmitate?

      A: Common specifications include assay on a dry basis, melting range around 107-117 C, specific rotation, loss on drying, residue on ignition, heavy metals and color/appearance. Store it sealed in a cool, dry place away from light and moisture.

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