Description

L-Ascorbic Acid, Compound With L-Cysteine is a unique molecular complex that combines the potent antioxidant properties of ascorbic acid with the sulfur-containing amino acid cysteine. This compound is valued for its synergistic activity, offering enhanced stability and functionality compared to its individual components. It serves as a critical ingredient for manufacturers in the pharmaceutical, nutraceutical, and high-end cosmetic industries, where advanced antioxidant systems and targeted biochemical activity are required.

Application

• Pharmaceutical Formulations: Used as an active pharmaceutical ingredient (API) or excipient in antioxidant therapies, wound healing preparations, and detoxification support products.
• Dietary Supplements & Nutraceuticals: A key component in advanced antioxidant blends, liver support formulas, and anti-aging supplements due to its role in glutathione synthesis.
• Cosmetics & Skincare: Incorporated into serums, creams, and lotions for its skin-brightening, anti-aging, and protective effects against environmental oxidative stress.
• Biochemical Research: Serves as a reagent and standard in studies related to redox biology, free radical scavenging, and cellular protection mechanisms.
• Food Fortification (Specialized): Employed in specific functional food and beverage applications where a stabilized, synergistic antioxidant system is needed.

Basic Information

Product Name	L-Ascorbic Acid, Compound With L-Cysteine
CAS No.	35412-64-7
Molecular Formula	C9H13NO8S
Molecular Weight	295.27 g/mol
Synonyms	Ascorbic Acid Cysteine Complex; L-Cysteine Ascorbate; Cysteine Ascorbic Acid Salt; Ascorbyl Cysteine; Vitamin C-Cysteine Complex; (2R)-2-[(2R)-3,4-Dihydroxy-5-oxo-2H-furan-2-yl]-2-hydroxyethyl (2R)-2-amino-3-sulfanylpropanoate; Antioxidant Complex AA-CYS
EINECS	Contact for details

Quality Control

Our L-Ascorbic Acid, Compound With L-Cysteine is produced under strict quality management systems. Each batch is tested to ensure it meets stringent specifications for identity, purity, and composition, suitable for pharmaceutical and nutraceutical applications. Certificates of Analysis (COA) documenting results for assay, related substances, and residual solvents are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and easily oxidized; containers must be kept tightly sealed after opening to minimize exposure to air and moisture. For long-term storage, consider using an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	98.0% - 102.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 1.0%
Specific Rotation	+20.5° to +21.5° (c=1 in H2O)

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