Description

Dl-Cysteine Hydrochloride Monohydrate is a high-purity, versatile amino acid derivative essential for biochemical and industrial synthesis. This compound serves as a critical building block and reducing agent, valued for its stability in the hydrochloride monohydrate form. It is primarily utilized in the pharmaceutical, nutraceutical, and food industries for applications ranging from drug formulation to flavor enhancement.

Application

• Pharmaceutical Intermediates: Used as a precursor in the synthesis of active pharmaceutical ingredients (APIs) and as a stabilizer in injectable formulations.
• Nutraceutical & Dietary Supplements: Incorporated as a source of L-cysteine in supplements for its antioxidant properties and role in glutathione synthesis.
• Food & Flavor Industry: Acts as a dough conditioner in baking and a flavor enhancer in savory products and meat analogs.
• Biochemical Research: Employed as a reducing agent to break disulfide bonds in protein studies and cell culture media preparation.
• Cosmetic & Personal Care: Functions as a hair-waving/straightening agent and a skin-conditioning ingredient.
• Animal Feed Additives: Used to improve the nutritional profile of feed for livestock and poultry.

Basic Information

Item	Details
Product Name	Dl-Cysteine Hydrochloride Monohydrate
CAS No.	116797-51-4
Molecular Formula	C3H7NO2S · HCl · H2O
Molecular Weight	175.63 g/mol
Synonyms	DL-Cysteine HCl monohydrate; (±)-2-Amino-3-mercaptopropanoic acid hydrochloride monohydrate; Racemic Cysteine Hydrochloride Monohydrate; Cysteine Hydrochloride Hydrate; 3-Mercapto-DL-alanine hydrochloride monohydrate; H-Cys-OH · HCl · H2O; DL-2-Amino-3-sulfhydrylpropionic acid hydrochloride monohydrate
EINECS	Contact for details

Quality Control

Our Dl-Cysteine Hydrochloride Monohydrate is manufactured under strict quality management systems. We offer grades suitable for various applications, including those aligned with Food Chemical Codex (FCC) and pharmaceutical standards. Every batch undergoes rigorous analytical testing to ensure identity, purity, and safety. A comprehensive Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under conditions that minimize exposure to atmospheric humidity to prevent caking and degradation.

Specification

Item	Specification
Appearance	White to almost white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Specific Rotation	-0.10° to +0.10° (c=1 in H2O)
pH (5% solution)	1.5 - 2.5
Loss on Drying	8.0% - 10.0%
Residue on Ignition	≤ 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.