Aluminum ammonium sulfate

Aluminium ammonium sulfate, a form of alum, is a firming agent and a raising agent component.

Where it is and isn’t permitted

Status of Aluminum ammonium 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 AdministrationPermitted21 CFR 182.1127retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Crystallised from aluminium sulfate and ammonium sulfate together.

  • Vegan
  • Vegetarian
InChIKey
LCQXXBOSCBRNNT-UHFFFAOYSA-K
PubChem
CID 3032540

Every name it appears under

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

CAS registry number

  • 7784-25-0

As it appears in regulation

  • Aluminum ammonium sulfate

Other names

  • Alum, ammonium
  • Alum, ammonium anhydrous
  • ALUM, AMMONIUM, EXSICCATED
  • Aluminium ammonium bis(sulphate)
  • Aluminium ammonium sulfate (1/1/2)
  • ALUMINIUM AMMONIUM SULFATE ANHYDROUS
  • aluminium(3+) ion ammonium disulfate
  • Aluminum ammonium alum
  • Aluminum ammonium bis(sulfate)
  • Aluminum ammonium disulfate (Al(NH4)(SO4)2)
  • ALUMINUM AMMONIUM SULFATE
  • Aluminum ammonium sulphate
  • aluminum sulfate ammonium salt
  • aluminum;azanium;disulfate
  • AMMONIUM ALUM [USP MONOGRAPH]
  • AMMONIUM ALUM ANHYDROUS
  • Ammonium alum; Ammonium aluminum alum; Ammonium aluminum sulfate
  • AMMONIUM ALUMINIUM SULFATE [WHO-DD]
  • Ammonium aluminum alum
  • Ammonium aluminum sulfate
  • AMMONIUM-ALUM
  • Caswell No. 041B
  • Curb
  • DPU64XYB1D
  • EPA Pesticide Chemical Code 098501
  • Exsiccated ammonium alum
  • HSDB 611
  • INS NO.523
  • INS-523
  • Monoammonium monoaluminum sulfate
  • SULFURIC ACID, ALUMINIUM AMMONIUM SALT (2:1:1)

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

  • ecfr 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/aluminum-ammonium-sulfate.json