Description

S-(Carboxymethyl)-DL-Cysteine is a modified amino acid derivative, specifically a carboxymethylated form of DL-cysteine. This compound is valued for its role as a key intermediate in pharmaceutical synthesis and biochemical research, offering a versatile building block for creating more complex molecules. It is primarily required by manufacturers in the pharmaceutical, nutraceutical, and research sectors for applications in drug development and as a precursor for specialized biochemical agents.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting respiratory conditions.
• Mucolytic Agent Precursor: Serves as a direct precursor or related compound in the production of mucolytic drugs like carbocisteine, which help break down mucus in the airways.
• Biochemical Research: Used in proteomics and biochemical studies as a modifying agent or standard for investigating thiol and carboxylic acid group reactivity.
• Nutraceutical Formulation: Employed in the development of advanced dietary supplements and functional food ingredients designed to support respiratory health.
• Cosmetic Ingredient Synthesis: Acts as an intermediate for producing hair care and skin care actives that leverage the properties of modified cysteine.
• Veterinary Pharmaceutical Production: Utilized in formulating veterinary medicines for treating respiratory ailments in animals.

Basic Information

Product Name	S-(Carboxymethyl)-DL-Cysteine
CAS No.	25390-17-4
Molecular Formula	C5H9NO4S
Molecular Weight	179.19 g/mol
Synonyms	Carbocisteine Impurity; DL-Carbocisteine; S-Carboxymethyl-DL-cysteine; 2-Amino-3-[(carboxymethyl)thio]propanoic acid; 3-[(Carboxymethyl)thio]-DL-alanine; Racemic Carbocisteine; S-Carboxymethylcysteine; DL-S-Carboxymethylcysteine; NSC 113891
EINECS	246-920-8

Quality Control

Our S-(Carboxymethyl)-DL-Cysteine is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets high-grade standards suitable for pharmaceutical intermediate use. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee 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, which can affect product stability and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%
Optical Rotation	Specific optical rotation provided on COA

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