CAS Registry Number

CAS 7783-11-1 — Ammonium sulfite

Ammonium sulfite (CAS 7783-11-1) is an inorganic salt primarily used as a reducing agent, bleaching agent, and in water treatment to remove chlorine and heavy metals. It also serves in textile processing, photography, and as a food additive (E222) for preserving color and preventing oxidation. This chemical has the molecular formula H10N2O4S with a molecular weight of 134.16 g/mol. It is typically stored at ambient conditions and carries a signal word of "Warning" for safety classification. Molekula supplies ammonium sulfite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.