Description

S-Carboxymethyl-L-Cysteine,Sodiumsalt CAS NO 49673-84-9 is the sodium salt derivative of the mucolytic agent S-Carboxymethyl-L-Cysteine. This compound is valued for its role as a key pharmaceutical intermediate and active ingredient, offering enhanced stability and solubility for formulation. It is primarily required by manufacturers in the pharmaceutical and nutraceutical industries for the production of respiratory medications and dietary supplements.

Application

• As a key active pharmaceutical ingredient (API) in mucolytic and expectorant drug formulations.
• As a critical intermediate in the synthesis of advanced pharmaceutical compounds targeting respiratory conditions.
• In the research and development of new therapeutic agents for chronic obstructive pulmonary disease (COPD) and bronchitis.
• For use in the production of high-purity dietary supplements and nutraceuticals supporting respiratory health.
• As a standard reference material in analytical laboratories for quality control and method validation.
• In biochemical research as a modified cysteine derivative for studying protein structure and function.

Basic Information

Product Name	S-Carboxymethyl-L-Cysteine,Sodiumsalt
CAS No.	49673-84-9
Molecular Formula	C5H8NNaO4S
Molecular Weight	201.17 g/mol
Synonyms	S-Carboxymethyl-L-Cysteine Sodium Salt; Carbocisteine Sodium Salt; S-Carboxymethylcysteine Sodium Salt; L-Carbocisteine Sodium; (R)-2-Amino-3-(carboxymethylthio)propanoic acid sodium salt; SCMC-Na; Mucolytic Agent Sodium Salt; Sodium (2R)-2-amino-3-[(carboxymethyl)sulfanyl]propanoate
EINECS	256-440-7

Quality Control

Our S-Carboxymethyl-L-Cysteine,Sodiumsalt is manufactured under strict quality systems. We offer material compliant with pharmaceutical-grade standards, and production can be aligned with current Good Manufacturing Practice (cGMP) principles for API manufacture. Every batch undergoes comprehensive analytical testing, and a Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided to ensure traceability and compliance.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Specific Rotation [α]20/D	-15.0° to -19.0° (c=1 in H2O)
pH (5% solution)	6.0 - 8.0
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.2%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 1.0%

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