Efirm new material co.,ltd was established in 2011, is a high-tech enterprise focusing on sulfur-containing chemicals and extending to the development of the optical materials industry chain. The main products are Thiourea 2-Mercaptoethanol 3-Mercaptopropionic acid hydrogen Cyanamide Polythiol series products. The products can be widely used in many different industries, like metal leaching process, pharmaceutical and pesticide intermediates production, oil field pipeline biocides, optical resin, adhesive and etc. Products Thiourea: CAS No.:62-56-6 2-Mercaptoethanol: CAS No.:60-24-2 3-Mercaptopropionic acid: CAS No. 107-96-0 Hydrogen sulfide: CAS No.7783-06-4 Polythiol 309: CAS No.: 101359-87-9 Polythiol 405(PENTAERYTHRITOL TETRAKIS(3-MERCAPTOPROPIONATE): CAS No.: 7575-23-7 Polythiol 504: CAS No.: 131538-00-6