Description DL-Ethionine, 99%, 5g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) White Appearance (Form) Powder Infrared Spectrum Conforms to structure Elemental Analysis: Carbon 43.5%-44.8%, Nitrogen 8.4%-8.7% Thin-layer Consistent with 99% purity Solubility 5% in HCl; Clear to slightly hazy, colorless to faint yellow solution CAS: 67-21-0 FORMULA: C2H5SCH2CH2CH(NH2)COOH