Description

L-Cystine Disodium Salt Hydrate is a stabilized, water-soluble derivative of the essential amino acid L-Cystine, designed for applications requiring enhanced bioavailability and handling convenience. This compound is critical for formulating nutritional supplements, pharmaceutical intermediates, and cell culture media where precise cysteine delivery is required. It serves the needs of manufacturers in the pharmaceutical, nutraceutical, and biotechnology industries seeking a reliable, high-purity source of this sulfur-containing amino acid.

Application

• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and as a key component in parenteral nutrition formulations.
• Nutraceutical & Dietary Supplements: A vital ingredient in amino acid supplements, protein powders, and specialized clinical nutrition products to support metabolic functions.
• Cell Culture & Fermentation Media: Provides a bioavailable cysteine source for mammalian cell culture, microbial fermentation, and bioprocess optimization.
• Biochemical Research & Diagnostics: Employed as a standard or reagent in enzymatic studies, biochemical assays, and diagnostic kit development.
• Cosmetic & Personal Care Formulations: Incorporated into hair and skin care products for its potential role in keratin synthesis and antioxidant properties.
• Food & Beverage Fortification: Used as a nutritional additive to enhance the amino acid profile of specialized food products and medical foods.

Basic Information

Product Name	L-Cystine Disodium Salt Hydrate
CAS No.	199329-53-8
Molecular Formula	C6H10N2Na2O4S2 • xH2O
Molecular Weight	Anhydrous: 276.24 g/mol (Contact for hydrated form details)
Synonyms	L-Cystine Disodium Salt; Cystine Disodium Salt; Disodium L-Cystinate; Disodium (2R,2'R)-3,3'-Dithiobis(2-aminopropanoate); L-Cystine, Disodium Salt, Hydrate; Cystine Disodium Salt Hydrate; Disodium Cystinate; (R,R)-Cystine Disodium Salt
EINECS	Contact for details

Quality Control

Our L-Cystine Disodium Salt Hydrate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards suitable for pharmaceutical and nutritional applications. Certificates of Analysis (COA) detailing purity, identity, and specific tests are provided with every shipment. We can supply material compliant with in-house specifications tailored to customer requirements, including potential alignment with relevant pharmacopeial guidelines (e.g., USP, EP).

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed after use to minimize exposure to atmospheric humidity. For long-term storage, consider desiccants or a dry inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0% (on anhydrous basis)
Specific Rotation	-215° to -225° (c=1 in 1N HCl)
Water Content (KF)	Contact for details
pH (5% Solution)	6.0 - 8.0
Heavy Metals	≤ 10 ppm
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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