Sodium hydrogen sulfate

INS 514(ii)CAS 7681-38-1

Used as an acidity regulator.

Sodium hydrogen sulfate, or sodium bisulfate, is an acidity regulator — a dry acid, used where a powder is needed rather than a liquid.

Where it is and isn’t permitted

Status of Sodium hydrogen sulfate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

1 food category

no numerical limit (good manufacturing practice)

CXS 192-1995 Table Three, INS 514(ii)and 1 further provisionretrieved 2026-09-07

What it is made from

Produced by reacting sodium chloride or sulfate with sulfuric acid. Despite the similar name it is not a sulphite and does not carry the sulphite declaration requirement.

  • Vegan
  • Vegetarian
CAS registry number
7681-38-1
InChIKey
WBHQBSYUUJJSRZ-UHFFFAOYSA-M
PubChem
CID 516919

Every name it appears under

45 recorded names. A label may use any of them.

INS number

  • 514(ii)

CAS registry number

  • 7681-38-1

Other names

  • BIF
  • Bisulfate of soda
  • BU8V88OWIQ
  • Caswell No. 742
  • EPA Pesticide Chemical Code 073201
  • Fanal
  • GBS
  • HNaO4S
  • INS NO.514(II)
  • INS-514(II)
  • Monosodium hydrogen sulfate
  • Monosodium sulfate
  • NaHSO4
  • Natriumbisulfat
  • Niter cake
  • Nitre cake
  • Sodium acid sulfate
  • sodium bi sulphate
  • Sodium bisulfate
  • Sodium bisulfate anhydrous
  • Sodium bisulfate pearls
  • Sodium bisulfate, fused
  • Sodium bisulfate, solid(DOT)
  • Sodium bisulphate
  • SODIUM HYDROGEN SULFATE
  • Sodium hydrogen sulfate (NaHSO4)
  • Sodium hydrogen sulfate, anhydrous
  • Sodium hydrogen sulfate, solid (DOT)
  • sodium hydrogen sulphate
  • sodium hydrogen-sulfate
  • sodium hydrogensulfate
  • Sodium hydrogensulphate
  • Sodium hydrosulfate
  • SODIUM SULFATE [WHO-DD]
  • Sodium sulfate, NaHSO4
  • Sodiumbisulfate
  • Sulfuric acid, monosodium salt
  • Sulfuric acid, sodium salt (1:1)
  • Sulfuric acid, sodiumsalt (1:1)
  • WC-Klosettreiniger
  • WC-Perfect
  • WC-Super

Systematic names

  • Sodium;hydrogen sulfate

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/sodium-hydrogen-sulfate.json