Description

Polycysteine CAS NO 62488-11-3 is a polymeric form of the amino acid cysteine, characterized by its unique disulfide-linked structure. This compound is valued for its role as a source of bioavailable sulfur and its ability to act as a reducing agent or antioxidant in complex systems. It finds essential applications in the pharmaceutical, nutraceutical, and biochemical research sectors. Its polymeric nature can offer distinct solubility and stability profiles compared to monomeric cysteine, making it suitable for specialized formulations.

Application

• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) where a controlled-release sulfur source or a structural component is required.
• Nutraceutical & Dietary Supplements: Incorporated as a specialized ingredient in formulations designed for antioxidant support, detoxification, and promoting glutathione synthesis.
• Biochemical Research: Serves as a model compound for studying disulfide bond formation, protein folding, and redox biochemistry in vitro.
• Cosmetic Ingredients: Potential use in hair care and skin care products for its purported benefits in keratin structure and antioxidant protection.
• Cell Culture Media: May be used as a component in specialized cell culture media to provide a stable cysteine source for sensitive cell lines.

Basic Information

Product Name	Polycysteine
CAS No.	62488-11-3
Molecular Formula	(C3H7NO2S)n
Molecular Weight	Variable (Polymer)
Synonyms	Poly(L-cysteine); L-Cysteine Homopolymer; Polycysteine Homopolymer; Cysteine Polymer; Poly(cysteine); Poly-L-cysteine; NSC 334909; Polycystein
EINECS	Contact for details

Quality Control

Our Polycysteine is produced and tested under a rigorous quality management system. Each batch is analyzed to ensure it meets stringent specifications for identity, purity, and polymeric characteristics. While specific grades are available, our standard quality control includes HPLC for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) documenting all test results is provided with every shipment to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, the container should be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to minimize moisture uptake and oxidation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0% (as L-cysteine equivalent)
Loss on Drying	≤ 5.0 %
Residue on Ignition	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Average Molecular Weight (GPC)	Contact for details

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