Arsenic

Arsenic (CAS 7440-38-2, EC 231-148-6, formula As) is a naturally occurring metalloid classified under Salts & Minerals. It is also referenced by the names Arsen, Arsenium, and arsane, and carries the HS code 28048000. No E-code designation applies to this substance.

In electronics manufacturing, arsenic serves as a dopant in semiconductor production, where trace quantities alter the electrical conductivity of silicon and germanium substrates. In catalysis applications, arsenic compounds act as promoters or selective poisons to control reaction pathways in industrial chemical processes, improving selectivity toward target products.

Arsenic is supplied in elemental powder form and is subject to strict regulatory controls under REACH (Regulation EC 1907/2006), including Substance of Very High Concern (SVHC) obligations. Procurement must account for classification under CLP Regulation as a Category 1A carcinogen. Buyers should confirm authorisation requirements and applicable restrictions before placing orders.