Description

Dl-Cysteine CAS NO 150146-94-4 is a synthetic, racemic mixture of the amino acid cysteine, offering a versatile and cost-effective alternative to the naturally occurring L-enantiomer. This compound is valued for its role as a reducing agent, antioxidant, and precursor in various chemical syntheses. It serves as a critical raw material for industries including pharmaceuticals, cosmetics, food and beverage, and biochemical research.

Application

• Pharmaceutical Synthesis: Used as an intermediate in the production of active pharmaceutical ingredients (APIs), particularly those requiring a thiol group for activity or as a building block for peptide synthesis.
• Cosmetics & Personal Care: Acts as an antioxidant and hair-waving/straightening agent in permanent wave solutions and depilatory creams due to its ability to break disulfide bonds in keratin.
• Food & Beverage Industry: Employed as a dough conditioner and flavor enhancer in bakery products, and as an antioxidant to prevent spoilage in certain food systems.
• Biochemical Research: Serves as a crucial reagent in cell culture media as a component of glutathione synthesis and in various enzymatic and biochemical assays.
• Chemical Manufacturing: Functions as a precursor or intermediate in the synthesis of other sulfur-containing compounds, including certain agrochemicals and specialty chemicals.
• Nutritional Supplements: Utilized in certain nutraceutical formulations, though L-Cysteine is more common for direct human supplementation.

Basic Information

Product Name	Dl-Cysteine
CAS No.	150146-94-4
Molecular Formula	C3H7NO2S
Molecular Weight	121.16 g/mol
Synonyms	DL-Cysteine; (±)-Cysteine; rac-Cysteine; 2-Amino-3-mercaptopropanoic acid; Cysteine, DL-; DL-2-Amino-3-mercaptopropionic acid; NSC 27425; DL-α-Amino-β-thiolpropionic acid
EINECS	Contact for details

Quality Control

Our Dl-Cysteine is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for industrial and research applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment. We can supply material compliant with various pharmacopeial standards (e.g., USP, EP) for specific customer requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be kept under dry conditions to prevent caking and degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Optical Rotation	± 0.5° (c=1 in 1N HCl)
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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