Description

n-Acetyl-S-Ethyl-L-Cysteine is a modified cysteine derivative that serves as a key intermediate and building block in advanced organic synthesis. This compound is valued for its role in introducing protected thiol and acetylated amine functionalities into complex molecular architectures. It is primarily sought by research institutions and manufacturers in the pharmaceutical, biotechnology, and fine chemical sectors for applications ranging from peptide synthesis to the development of novel therapeutic agents and biochemical probes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and prodrugs, particularly those targeting conditions related to oxidative stress or requiring cysteine modulation.
• Peptide Chemistry: Serves as a protected cysteine analog in solid-phase and solution-phase peptide synthesis to construct peptides with specific disulfide bonding patterns or functionalized side chains.
• Biochemical Research: Employed as a substrate or inhibitor in enzymatic studies, especially those involving cysteine proteases or transferases, to investigate metabolic pathways.
• Precursor for Chelating Agents: Acts as a starting material for synthesizing specialized ligands and chelating agents used in metal catalysis or detoxification processes.
• Reference Standard: Utilized as an analytical standard in quality control laboratories for method development and validation in pharmaceutical analysis.

Basic Information

Product Name	n-Acetyl-S-Ethyl-L-Cysteine
CAS No.	19542-76-8
Molecular Formula	C7H13NO3S
Molecular Weight	191.25 g/mol
Synonyms	N-Acetyl-S-ethyl-L-cysteine; N-Acetyl-S-ethylcysteine; S-Ethyl-N-acetyl-L-cysteine; N-Acetyl-S-ethylcystein; L-Cysteine, N-acetyl-S-ethyl-; Acetyl-S-ethylcysteine; 2-(Acetylamino)-3-(ethylthio)propanoic acid; 2-Acetamido-3-ethylsulfanylpropanoic acid
EINECS	243-158-5

Quality Control

Our n-Acetyl-S-Ethyl-L-Cysteine is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, chiral analysis, and residual solvent screening, to ensure it meets the high standards required for research and synthesis. Certificates of Analysis (COA) detailing all test results are provided with every shipment and are available 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to minimize exposure to atmospheric humidity.

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
Chiral Purity (HPLC)	≥ 99.0% L-isomer
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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