CAS Registry Number

CAS 1113-41-3 — L-Penicillamine

L-Penicillamine is a thiol-containing amino acid used primarily in chelation therapy for heavy metal poisoning (e.g., Wilson’s disease) and as a disease-modifying agent in cystinuria and rheumatoid arthritis. It is also employed in research for its metal-binding and antioxidant properties. This chemical has a CAS number of 1113-41-3, molecular formula (CH₃)₂C(SH)CH(NH₂)CO₂H, and a molecular weight of 149.21 g/mol. Store it between 2–8°C, and handle with caution—it carries a **Warning** signal word for safety. Molekula supplies L-Penicillamine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.