Sodium fumarate

Sodium fumarate (CAS 7704-73-6) is the sodium salt of fumaric acid, available in monosodium and disodium forms. It is also referred to as fumaric acid sodium salt and carries the molecular formula C4H4O4.xNa. It does not hold an assigned E-number in the EU food additive framework.

In food and beverage formulations, sodium fumarate functions as an acidulant and pH buffer, moderating acidity through its diprotic salt chemistry to stabilise product taste profiles. In pharmaceutical manufacturing, it serves as a buffering agent in oral and topical preparations, where controlled pH maintenance directly affects active ingredient stability and bioavailability.

Sodium fumarate is sourced in technical and food-grade specifications, with compliance references including FCC and REACH registration requirements for EU market supply. It is typically available in powder form, supplied in 25 kg bags or fibre drums. Procurement teams should confirm grade specification against intended application prior to ordering.