L-Cystine is the oxidized dimer of L-cysteine, two cysteine molecules joined by a disulfide bond, chemically (2R,2'R)-3,3'-disulfanediylbis(2-aminopropanoic acid) (CAS 56-89-3, C6H12N2O4S2, MW 240.30). As a distinct dimeric compound rather than a salt of cysteine, it has roughly double the molecular weight and two sulfur atoms, and it is markedly less water-soluble than cysteine. This grade is fermentation-derived, the vegan route, rather than keratin-hydrolysed, and supplied as a crystalline powder standardized to a typical assay of at least 98.5%. We manufacture it in powder, capsule and tablet formats.
- Powders
- Capsules
- Tablets
Applications
Amino-acid supplements, powders, capsules and tablets.
Documentation & quality
Every order is backed by the documents your quality team files, and the controls behind them.
Certificate of Analysis
every batchSpecification sheet
on requestAllergen statement
on requestGMO statement
on requestTraceability
on requestSafety Data Sheet
where applicableHow it’s controlled
- Identity verified on every incoming raw material
- Screened for heavy metals and microbial contaminants
- Full batch and lot traceability
- Produced under our certified NSF GMP system