What is Ascorbyl Palmitate CAS 137-66-6?

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.

How does Ascorbyl Palmitate differ from ascorbic acid?

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.

What are the main food applications of Ascorbyl Palmitate?

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.

What cosmetic applications are relevant?

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.

Ascorbyl Palmitate CAS 137-66-6

Ascorbyl Palmitate, CAS 137-66-6, also known as vitamin C palmitate or E304, is a fat-soluble vitamin C ester and antioxidant supplied for food, cosmetic and pharmaceutical applications. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

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, CAS 137-66-6, also called vitamin C palmitate, is a fat-soluble ester of ascorbic acid.

Synonyms: L-Ascorbyl palmitate; Vitamin C palmitate; Palmitoyl ascorbic acid; 6-O-Palmitoyl-L-ascorbic acid; E304 antioxidant.

CAS: 137-66-6.

It has the molecular formula C22H38O7 and molecular weight 414.53 g/mol.

It appears as a white to yellowish powder with a slight citrus odor.

It has an assay of 98.0–100.5% on a dry basis and a melting point of about 115.0–118.0 °C.

It is insoluble in water and soluble in ethanol and vegetable oils.

It is an oil-soluble antioxidant used to delay oxidative rancidity in oils and fats.

It is used in food as antioxidant E304 in fats, oils, margarine, mayonnaise and lipid-rich products.

It protects beta-carotene and other natural pigments in beverages and dairy products.

It is used in anti-aging cosmetics to support collagen synthesis and reduce fine lines.

It is used in skin-brightening products to inhibit tyrosinase and reduce pigmentation.

It is used in sun care to neutralize UV-induced free radicals.

It is used as a vitamin C source in lipid-based pharmaceutical formulations and soft gel capsules.

Confirm appearance, odor, assay, melting point, specific rotation, loss on drying, residue on ignition, heavy metals, arsenic, lead and solubility.

Store in a cool, dry place, sealed and away from light and moisture.

Confirm packaging with the requested quantity and destination requirements.

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

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

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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