Description

n-Acetyl-L-Cysteine Methyl Ester is a chemically modified derivative of the amino acid L-cysteine, specifically designed to enhance stability and bioavailability. This compound is a critical intermediate and building block in the synthesis of more complex molecules, particularly in the pharmaceutical sector. It is essential for researchers and manufacturers in the pharmaceutical, biotechnology, and fine chemical industries who require a high-purity, reactive precursor for drug development and biochemical applications.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting respiratory conditions, liver function, and as a mucolytic agent precursor.
• Biochemical Research: Used as a reagent in proteomics and cell biology studies, often for protein modification, peptide synthesis, and as a source of L-cysteine in cell culture media.
• Antioxidant Studies: Serves as a research compound in studying antioxidant mechanisms and the role of thiol groups in redox biology.
• Peptide Synthesis: Employed in solid-phase and solution-phase peptide synthesis as a protected cysteine derivative to prevent unwanted side reactions.
• Cosmetic Ingredient Synthesis: Acts as a precursor in the production of certain cosmetic actives where stabilized cysteine derivatives are required for skin and hair care formulations.
• Nutritional Supplement Research: Investigated for its potential use in the development of advanced nutraceutical and dietary supplement formulations.

Basic Information

Product Name	n-Acetyl-L-Cysteine Methyl Ester
CAS No.	32381-28-5
Molecular Formula	C6H11NO3S
Molecular Weight	177.22 g/mol
Synonyms	N-Acetyl-L-cysteine methyl ester; N-Acetylcysteine methyl ester; L-Cysteine, N-acetyl-, methyl ester; Methyl N-acetyl-L-cysteinate; NAC methyl ester; Acetylcysteine methyl ester; (2R)-2-(Acetylamino)-3-sulfanylpropanoic acid methyl ester; Methyl (2R)-2-acetamido-3-mercaptopropanoate
EINECS	Contact for details

Quality Control

Our n-Acetyl-L-Cysteine Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for pharmaceutical and research applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles 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 place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under dry conditions to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Optical Rotation	Specific range provided on COA
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.