Description

Ethyl Cysteine Hydrochloride is a modified amino acid derivative where an ethyl group is attached to the sulfur atom of cysteine. This structural modification enhances its stability and alters its biochemical properties, making it a valuable intermediate in advanced synthesis. It is primarily utilized in the pharmaceutical and research sectors for applications requiring a protected or functionalized cysteine moiety. The compound is supplied as a high-purity material suitable for demanding industrial and laboratory processes.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of peptide-based drugs and active pharmaceutical ingredients (APIs).
• Biochemical Research: Used as a substrate or precursor in enzymatic studies and metabolic pathway research.
• Cosmetic Ingredient: Potential application in hair care and skin formulations as a source of sulfur for keratin synthesis.
• Nutritional Supplement Research: Investigated for its role as a precursor to glutathione and other antioxidants.
• Chemical Synthesis: Serves as a chiral synthon for the preparation of more complex organic molecules.

Basic Information

Product Name	Ethyl Cysteine Hydrochloride
CAS No.	75521-14-1
Molecular Formula	C5H12ClNO2S
Molecular Weight	185.67 g/mol
Synonyms	S-Ethyl-L-cysteine hydrochloride; L-Cysteine, S-ethyl-, hydrochloride; (R)-2-Amino-3-(ethylthio)propanoic acid hydrochloride; Ethylcysteine HCl; 2-Amino-3-(ethylsulfanyl)propanoic acid hydrochloride; NSC 113935; S-Ethylcysteine hydrochloride
EINECS	Contact for details

Quality Control

Our Ethyl Cysteine Hydrochloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) detailing key parameters such as assay, chiral purity, and impurity profiles. Our quality commitment supports applications in regulated environments, and we can supply material compliant with relevant pharmacopeial standards upon request.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation	[α]20/D: Specific range provided on COA
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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