Description

Mecysteine CAS NO 2485-62-3 is a high-purity pharmaceutical intermediate and a derivative of the amino acid cysteine, valued for its role as a mucolytic agent and precursor in advanced synthesis. Its primary commercial significance lies in the production of active pharmaceutical ingredients (APIs) for respiratory medications and as a critical building block in peptide chemistry. This compound is essential for manufacturers in the pharmaceutical, biotechnology, and fine chemical sectors requiring reliable, high-quality raw materials for drug development and production.

Application

• Pharmaceutical API Synthesis: Key intermediate in the manufacture of mucolytic and expectorant drugs.
• Respiratory Therapeutics: Used in the production of medications designed to treat chronic obstructive pulmonary disease (COPD), bronchitis, and cystic fibrosis.
• Peptide Chemistry: Serves as a protected cysteine derivative in the solid-phase and solution-phase synthesis of complex peptides and proteins.
• Biochemical Research: Employed as a standard or reagent in studies involving thiol chemistry, antioxidant mechanisms, and protein structure.
• Nutraceutical Formulation: Potential use as a precursor in the development of specialized supplements targeting cellular antioxidant defense.
• Cosmetic Ingredient Intermediate: Used in the synthesis of compounds for hair care and skin conditioning formulations.

Basic Information

Product Name	Mecysteine
CAS No.	2485-62-3
Molecular Formula	C4H9NO2S
Molecular Weight	135.19 g/mol
Synonyms	L-Mecysteine; Methylcysteine; (R)-2-Amino-3-(methylthio)propanoic acid; 3-(Methylthio)-L-alanine; NSC 112182; S-Methyl-L-cysteine; L-2-Amino-3-(methylthio)propionic acid; Methyl-L-cysteine
EINECS	219-637-5

Quality Control

Our Mecysteine is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity suitable for pharmaceutical applications. Quality is verified through comprehensive analytical testing, including HPLC for assay and related substances, and identification by IR and NMR. A Certificate of Analysis (COA) documenting full specifications is provided with each shipment to support your quality assurance and regulatory compliance needs.

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 to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference standard
Assay (HPLC)	≥ 98.5%
Optical Rotation [α]20/D	+20.0° to +24.0° (c=1 in 1N HCl)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 1.0%

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