Import 3-Mercaptopropionic Acid (3mpa) — Buy in wholesale FOB from Supplier in China

3-Mercaptopropionic Acid (3MPA), chemical formula HS-CH2-CH2-COOH and molecular structure C3H6O2S, is an organosulfur bifunctional compound supplied by Guangzhou Swan Chemical Co., Ltd. from their facility at Room 608, Dongpu Commercial Building C, 288 Zhongshan Road, Tianhe District, Guangzhou. This material functions as a chain transfer agent in polymer synthesis, a chemical intermediate in pharmaceutical and agrochemical manufacturing, and a corrosion inhibitor in industrial formulations. The thiol and carboxylic acid groups confer distinct reactivity profiles: the thiol participates in radical-mediated chain transfer and metal surface adsorption, while the carboxyl enables salt formation, esterification and amide coupling chemistry.

Guangzhou Swan Chemical positions this as industrial-grade material with emphasis on reactivity performance in specialty chemical manufacturing. The compound's mercapto group shows characteristic nucleophilicity, with pKa of the thiol proton around 7.5-8.0 in aqueous solution, making it reactive under mild basic conditions. In polymer applications, 3MPA regulates molecular weight by terminating growing radical chains and initiating new ones, with transfer constants varying by monomer type, acrylic acid systems being particularly responsive. The material is hygroscopic and oxidatively sensitive, requiring handling protocols that minimise air exposure to prevent disulfide (3,3'-dithiodipropionic acid) formation, which depletes active thiol content and alters performance in stoichiometric applications.

Primary buyers include polymer manufacturers formuting acrylic and styrenic resins, pharmaceutical API producers requiring sulfur-containing building blocks, agrochemical formulators, and metal treatment chemical suppliers. Guangzhou Swan Chemical offers this material in bulk packaging for global export trade, though specific container types, fill weights and UN certification are not detailed in the listing. For import procurement, buyers should confirm the manufacturing location (whether Swan manufactures or sources the material), request batch-specific COA data including thiol assay and impurity profile, and verify that the supplier's quality management system aligns with the buyer's regulatory requirements for the intended application.

Guangzhou Swan Chemical Co., Ltd. is located at Room 608, Dongpu Commercial Building C, 288 Zhongshan Road, Tianhe District, Guangzhou, 510660, Guangdong Province, China, placing it within one of China's principal chemical trading and manufacturing regions. The company holds a harbor trust tier and an imported supplier tier classification on this platform, with a reported 0.00% response rate and zero average response hours, indicating limited active communication through this channel. The business operates as a trading company with stated specialisation in specialty and industrial chemicals for export markets.

The supplier profile does not disclose manufacturing ownership, annual turnover, employee count, specific facility certifications, or client references, so buyers must conduct independent verification of operational scale and quality system credentials. Guangzhou Swan Chemical explicitly markets 3MPA for polymer synthesis, pharmaceutical intermediate, agrochemical and corrosion inhibitor applications, suggesting technical sales capability in these sectors. However, the absence of stated ISO certification, manufacturing licences, or third-party audit credentials in the listing requires buyers to request GMP, ISO 9001 or equivalent documentation directly during qualification.