Description

Cystine CAS NO 24645-67-8 is a stable, oxidized dimer of the amino acid cysteine, characterized by a disulfide bond that is crucial for protein structure and stability. This compound is essential for applications requiring a controlled source of sulfur or a precursor for cysteine synthesis under reducing conditions. It is a vital raw material for the pharmaceutical, nutraceutical, and food industries, where it serves as a key ingredient in infusion solutions, dietary supplements, and flavor enhancers.

Application

• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and as a component in parenteral nutrition and infusion solutions.
• Dietary Supplements & Nutraceuticals: Incorporated into capsules and tablets to support hair, skin, and nail health due to its high sulfur content.
• Food & Beverage Industry: Employed as a flavor enhancer and nutritional fortifier in processed foods and health drinks.
• Cosmetic & Personal Care: Utilized in hair care and skincare formulations for its strengthening and antioxidant properties.
• Biochemical Research: Serves as a standard and reagent in biochemical assays, cell culture media, and metabolic studies.
• Animal Feed Additives: Added to feed to improve the health and growth performance of livestock and poultry.

Basic Information

Product Name	Cystine
CAS No.	24645-67-8
Molecular Formula	C6H12N2O4S2
Molecular Weight	240.30 g/mol
Synonyms	L-Cystine; (R,R)-3,3'-Dithiobis(2-aminopropanoic acid); Dicysteine; Gelucystine; Cystine Disulfide; 3,3'-Dithiobis-L-alanine; β,β'-Dithiodialanine
EINECS	246-376-1

Quality Control

Our Cystine is manufactured under strict quality management systems. Each batch is tested to ensure it meets high-purity standards, typically conforming to USP, EP, and FCC grade specifications where applicable. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing parameters such as assay, optical rotation, heavy metals, and loss on drying to guarantee consistency and regulatory compliance for your applications.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	98.5% - 101.0%
Specific Rotation	-215° to -225°
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.0%

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