Description

L-Ascorbyl 6-Stearate is a lipid-soluble derivative of ascorbic acid (Vitamin C), synthesized by esterifying the 6-hydroxyl group with stearic acid. This modification significantly enhances its stability and compatibility with lipid-based systems, making it a highly effective oil-soluble antioxidant. It is primarily utilized in the food, cosmetic, and pharmaceutical industries where protection against oxidative rancidity and degradation in fatty matrices is critical. Its ability to function synergistically with other antioxidants makes it a valuable component for formulators seeking to extend product shelf life and maintain quality.

Application

• Food & Beverage Industry: Used as an antioxidant in edible oils, fats, margarine, snacks, and processed foods to prevent rancidity and preserve flavor and nutritional value.
• Cosmetics & Personal Care: Incorporated into creams, lotions, lipsticks, and sunscreens as a stabilizer to protect lipid ingredients from oxidation, thereby extending product shelf life.
• Pharmaceuticals & Nutraceuticals: Employed in oil-based vitamin supplements, softgel capsules, and topical ointments as an antioxidant to maintain the potency of active ingredients.
• Animal Feed & Pet Food: Added to fat-containing feed premixes to prevent the oxidation of essential fatty acids and fat-soluble vitamins.
• Industrial Applications: Functions as an antioxidant in lubricants, greases, and certain polymer systems where oxidative stability is required.

Basic Information

Product Name	L-Ascorbyl 6-Stearate
CAS No.	25395-66-8
Molecular Formula	C24H42O7
Molecular Weight	442.59 g/mol
Synonyms	Ascorbyl Stearate; Ascorbyl Monostearate; Vitamin C Stearate; 6-O-Stearoyl-L-ascorbic acid; L-Ascorbic Acid 6-Stearate; E-304; INS 304; Ascorbyl Palmitate (structural analog, often grouped commercially)
EINECS	246-944-9

Quality Control

Our L-Ascorbyl 6-Stearate is manufactured under strict quality management systems. Each batch is tested to ensure it meets relevant specifications for food, cosmetic, and pharmaceutical applications, including compliance with FCC (Food Chemicals Codex) and other industry guidelines. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). The product is light-sensitive and should be stored away from direct light exposure. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to slightly yellowish powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0 %
Melting Point	116 - 120 °C
Loss on Drying	≤ 1.0 %
Residue on Ignition (Sulfated Ash)	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Specific Optical Rotation [α]20/D	+20.5° to +22.0°

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