Description

Ascorbyl Monostearate is a lipid-soluble ester derivative of ascorbic acid (Vitamin C) and stearic acid. This compound is valued for its antioxidant properties and enhanced stability in lipid-based systems compared to pure ascorbic acid. It is a critical functional ingredient for manufacturers in the cosmetics, food, and pharmaceutical industries, where it acts to prevent oxidation and extend product shelf life.

Application

• Cosmetic & Personal Care: A key antioxidant and stabilizer in creams, lotions, ointments, and lipsticks to prevent rancidity and protect skin from oxidative stress.
• Food & Beverage: Used as a fat-soluble antioxidant (E304) in oils, fats, margarine, and fat-containing foods to inhibit lipid peroxidation.
• Pharmaceuticals: Employed as an excipient and stabilizer in topical formulations and softgel capsules to enhance the oxidative stability of active ingredients.
• Nutraceuticals & Dietary Supplements: Incorporated into oil-based supplement blends and vitamin premixes for its antioxidant activity.
• Animal Feed: Acts as a preservative and antioxidant in fat-containing feed components to maintain nutritional quality.

Basic Information

Product Name	Ascorbyl Monostearate
CAS No.	51222-59-4
Molecular Formula	C24H42O7
Molecular Weight	442.59 g/mol
Synonyms	L-Ascorbyl Monostearate; Ascorbyl Stearate; Vitamin C Stearate; 6-O-Stearoyl-L-ascorbic acid; E304; Ascorbic Acid Monostearate; L-Ascorbic Acid 6-Stearate; INS 304
EINECS	257-102-4

Quality Control

Our Ascorbyl Monostearate is produced and tested under a rigorous quality management system. We offer grades compliant with relevant industry standards such as FCC (Food Chemicals Codex) for food applications and cosmetic-grade specifications. Every batch is accompanied by a comprehensive Certificate of Analysis (COA) to ensure traceability and confirm compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat, open flames, and incompatible materials. Under these conditions, the product remains stable for an extended period.

Specification

Item	Specification
Appearance	White to slightly yellowish powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0 %
Melting Point	116 - 119 °C
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 1.0 %
Residue on Ignition	≤ 0.1 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.