Description

L-Selenocystine is the selenium-containing analog of the amino acid cystine, where sulfur atoms are replaced by selenium. This unique biochemical property makes it a critical precursor for the synthesis of selenoproteins and selenoenzymes, which are essential for antioxidant defense and redox regulation. It is primarily utilized by research institutions and manufacturers in the pharmaceutical, nutraceutical, and life science sectors for applications ranging from biochemical research to the development of novel therapeutic agents.

Application

• Biochemical Research: Used as a standard and reagent in studies of selenium metabolism, selenoprotein synthesis, and redox biology.
• Pharmaceutical Intermediates: Serves as a key building block for the synthesis of selenium-based drug candidates and diagnostic agents.
• Nutraceutical Formulation: Incorporated into advanced dietary supplements and functional foods designed for antioxidant support.
• Enzyme Mimetics: Employed in the development of synthetic enzymes (selenoenzymes) with enhanced catalytic activity.
• Cell Culture Media: Used as a specialized additive in defined media for studying selenium-dependent cellular pathways.
• Reference Standard: Acts as a high-purity calibrant in analytical methods such as HPLC and LC-MS for quality control in related products.

Basic Information

Product Name	L-Selenocystine
CAS No.	29621-88-3
Molecular Formula	C6H12N2O4Se2
Molecular Weight	334.09 g/mol
Synonyms	(+)-Selenocystine; L-(-)-Selenocystine; (R,R)-Selenocystine; 3,3'-Diselanediylbis(2-aminopropanoic acid); Selenium cystine; H-SeCys-SeCys-OH; (2R,2'R)-3,3'-Diselanediylbis(2-aminopropanoic acid)
EINECS	Contact for details

Quality Control

Our L-Selenocystine is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets exacting standards for research and production use. Certificates of Analysis (COA) with detailed batch-specific results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C under an inert atmosphere (e.g., nitrogen or argon) due to its sensitivity to oxidation and moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Optical Rotation [α]	- Contact for details -
Water Content (KF)	≤ 1.0%
Heavy Metals	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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