CAS Registry Number

CAS 657-84-1 — p-Toluenesulfonic acid sodium salt

p-Toluenesulfonic acid sodium salt is an organic sulfonate compound widely used as a catalyst in organic synthesis, a pH adjuster in pharmaceuticals, and a reagent in polymer chemistry. It is also an intermediate in dye manufacturing and a mild acid substitute in food processing. This chemical has a CAS number of 657-84-1, with the molecular formula CH3C6H4SO3Na and a molecular weight of 194.18. It is stored at ambient conditions and carries a **Warning** signal word under GHS classification. Molekula supplies p-Toluenesulfonic acid sodium salt from research to bulk quantities with full documentation and ISO 9001:2015 traceability.