Description

Propanoic Acid, 3-Mercapto-, Monosodium Salt is the monosodium salt of 3-mercaptopropionic acid, a key organosulfur compound. This product is valued for its role as a versatile intermediate and stabilizer, offering a reactive thiol group and carboxylate functionality. It is primarily utilized in the pharmaceutical, polymer, and specialty chemical industries for synthesis and formulation purposes.

Application

• Pharmaceutical Synthesis: Acts as a key building block or thiol-protecting group reagent in the production of active pharmaceutical ingredients (APIs).
• Polymer Industry: Used as a chain transfer agent (CTA) or modifier in radical polymerization processes to control molecular weight.
• Chemical Intermediate: Serves as a precursor for synthesizing more complex organosulfur compounds, ligands, and specialty chemicals.
• Cosmetic & Personal Care: Employed in formulations for hair care products, where its thiol group can participate in permanent wave solutions.
• Bioconjugation & Biochemistry: Utilized for modifying proteins, peptides, or other biomolecules via thiol-reactive chemistry.
• Stabilizer & Antioxidant: Functions as an antioxidant or stabilizer in certain formulations to prevent degradation.

Basic Information

Product Name	Propanoic Acid, 3-Mercapto-, Monosodium Salt
CAS No.	42267-40-3
Molecular Formula	C3H5NaO2S
Molecular Weight	128.12 g/mol
Synonyms	3-Mercaptopropionic Acid Sodium Salt; Sodium 3-Mercaptopropionate; Sodium 3-Mercaptopropanoate; 3-Mercaptopropanoic Acid Sodium Salt; 3-MPAS; Sodium Thioglycolate Propionate; NSC 3348; β-Mercaptopropionic Acid Sodium Salt
EINECS	255-734-5

Quality Control

Our Propanoic Acid, 3-Mercapto-, Monosodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, impurity profile, and physical specifications. Our quality commitment supports applications requiring high standards, including pharmaceutical development.

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 and easily oxidized nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to minimize moisture uptake and oxidation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%
pH (5% solution)	6.0 - 8.0

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