L-Cysteine

Product Details

CAS No:52-90-4

MF:C3H7NO2S

Appearance:white or off-white crystalline powder

Specification:AJI/BP/EP/USP

UN number:-

Package:1/5/10/25kgs/drum

Supply Capacity:Tons

Synonyms:3-mercapto-l-alanin;alpha-amino-beta-mercaptopropionicacid;alpha-Amino-beta-thiolpropionic acid;alpha-amino-beta-thiolpropionicacid;half-cysteine;L-Cysteine - animal origin;L-Cysteine - non-animal origin;Acetylcysteine EP Impurity B (L-Cysteine)

Product application:L-Cysteine,52-90-4,L-Cysteine base,L-2-Amino-3-mercaptopropionic acid,Natural sulfur-containing amino acid,Pharmaceutical grade L-Cysteine,USP grade cysteine,Food grade L-Cysteine,FCC grade dough conditioner,Glutathione precursor synthesis raw material,Hepatoprotective detox active,Flour treatment agent,Baking dough relaxer,Meat flavor precursor thermal reaction,Natural antioxidant fruit juice browning inhibitor,Cosmetic grade L-Cysteine,Hair perm reducing agent,Skin whitening active,Melanin synthesis inhibitor,Cell culture medium component,Biofermentation nutrient,High purity L-Cysteine 99%,L-Cysteine manufacturer China,CAS 52-90-4 supplier,Suzhou Health Chemicals amino acids,L-Cysteine wholesale bulk export

 

L-Cysteine functions as an indispensable natural sulfur-containing amino acid, potent biological reducing agent, and essential metabolic intermediate extensively utilized across the pharmaceutical, food science, dermato-cosmetic, and bioprocess engineering industries. In clinical therapeutics and pharmaceutical manufacturing, serving as the primary rate-limiting substrate for the intracellular biosynthesis of glutathione, it provides crucial physiological protection against oxidative cytotoxicity, hepatic drug damage, and radiation injury; it is universally formulated into total parenteral nutrition infusions, liver protective preparations, and mucolytic drug building blocks. In the commercial food processing and baking sectors, owing to the cleavage capability of its active thiol group on gluten disulfide bridges, it serves as an essential dough conditioner that optimizes flour rheology, enhances dough elasticity, and reduces mixing duration, while also acting as an effective anti-browning antioxidant in fruit processing and a fundamental precursor in thermal Maillard reactions to generate authentic savory meat flavor profiles. In dermatological cosmetics and personal care formulations, it is widely utilized as a gentle, low-odor active reducing agent in permanent hair waving lotions and as a skin-brightening active that inhibits tyrosinase activity and intercepts melanin synthesis pathways. Furthermore, in biopharmaceutical upstream processing, L-Cysteine is an essential nutrient component in serum-free mammalian cell culture media, supporting recombinant protein expression and microbial fermentation kinetics.