DL-Homocysteine thiolactone hydrochloride Description Homologue of the amino acid cysteine. Specifications Cas No. 6038-19-3 Product ID H5748 Product Name DL-Homocysteine thiolactone hydrochloride Synonym (+-)-Dihydro-3-amino-2(3H)-thiophenone hydrochloride Formula Wt. 153.63 Melting Point 201oC-202oC Purity ≥98% Solubility Soluble in water. Store Temp Ambient Ship Temp Ambient