Description

L-Cysteine Hydrochloride Monohydrate is a high-purity amino acid derivative essential for its role as a reducing agent and nutrient. This compound is critical for applications demanding reliable quality and consistent performance, particularly in pharmaceutical synthesis and food processing. It is primarily utilized by manufacturers in the nutraceutical, pharmaceutical, and food industries for its biochemical properties.

Application

• Pharmaceutical Intermediates: Used as a key chiral building block in the synthesis of various active pharmaceutical ingredients (APIs) and peptides.
• Nutraceutical & Dietary Supplements: Serves as a source of L-Cysteine, a conditionally essential amino acid, in vitamin and supplement formulations.
• Food & Beverage Industry: Functions as a dough conditioner in baking, a flavor enhancer, and an antioxidant in certain food systems.
• Biochemical Research: Employed in cell culture media and as a reagent in various biochemical and microbiological studies.
• Cosmetic & Personal Care: Acts as an antioxidant and hair conditioning agent in certain cosmetic preparations.
• Animal Feed Additive: Used as a nutritional supplement in feed to support animal health and growth.

Basic Information

Product Name	L-Cysteine Hydrochloride Monohydrate
CAS No.	7048-04-6
Molecular Formula	C3H7NO2S • HCl • H2O
Molecular Weight	175.63 g/mol
Synonyms	L-Cysteine HCl monohydrate; (R)-2-Amino-3-mercaptopropanoic acid hydrochloride monohydrate; Cysteine hydrochloride monohydrate; L-Cysteine monohydrochloride monohydrate; H-Cys-OH • HCl • H2O; L-2-Amino-3-mercaptopropionic acid hydrochloride monohydrate; Cystine precursor
EINECS	230-305-0

Quality Control

Our L-Cysteine Hydrochloride Monohydrate is manufactured under strict quality management systems. The product is tested to meet specifications relevant for food, pharmaceutical, and research grades, including potential compliance with FCC and USP standards where applicable. Certificates of Analysis (COA) documenting purity, identity, and safety parameters are available for every batch upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	98.5% - 101.5%
Specific Rotation [α]20/D	+5.5° to +7.0°
pH (5% solution)	1.5 - 2.5
Loss on Drying	7.0% - 9.5%
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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