Description

L-Ascorbic Acid 6-Stearate is a lipid-soluble derivative of Vitamin C, formed by esterifying ascorbic acid with stearic acid. This chemical modification significantly enhances its stability and oil solubility, making it a superior antioxidant for lipid-based systems compared to standard ascorbic acid. It is a critical ingredient for formulators in the cosmetics, nutraceutical, and food industries seeking to stabilize and fortify oil-phase products against oxidative degradation.

Application

• Cosmetic & Personal Care Antioxidant: Primary stabilizer in creams, lotions, lipsticks, and sunscreens to prevent rancidity and protect skin from oxidative stress.
• Nutraceutical & Dietary Supplement: Used in oil-based softgel capsules and lipid-based delivery systems to provide stable Vitamin C activity.
• Food & Beverage Additive: Acts as an antioxidant in fat-rich foods, edible oils, and fat-soluble vitamin preparations to extend shelf life.
• Pharmaceutical Excipient: Employed as a stabilizer in ointments, topical formulations, and lipid-based drug delivery vehicles.
• Animal Feed Additive: Provides a stable source of Vitamin C in premixes and fat-coated feed pellets.
• Industrial Antioxidant: Used in lubricants, greases, and certain polymer systems where oil-soluble antioxidant properties are required.

Basic Information

Product Name	L-Ascorbic Acid 6-Stearate
CAS No.	10605-09-1
Molecular Formula	C₂₄H₄₄O₇
Molecular Weight	444.60 g/mol
Synonyms	Ascorbyl Stearate; Ascorbic Acid Stearate; 6-O-Stearoyl-L-ascorbic Acid; L-Ascorbic Acid 6-O-Stearate; Vitamin C Stearate; E-304; INS 304; Ascorbyl Monostearate
EINECS	234-246-6

Quality Control

We supply L-Ascorbic Acid 6-Stearate that meets stringent quality standards suitable for food, cosmetic, and pharmaceutical applications. Our quality system ensures batch-to-batch consistency, with comprehensive testing against established specifications for identity, purity, and heavy metals. Certificates of Analysis (COA) are provided with each shipment, and we can support compliance with relevant standards such as FCC, USP/NF, and EU food additive regulations upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. The product is easily oxidized; for long-term storage, consider an inert atmosphere (nitrogen blanket). Keep away from strong oxidizing agents and excessive heat.

Specification

Item	Specification
Appearance	White to slightly yellowish powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	98.0% - 102.0%
Melting Point	116°C - 122°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.