{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/aluminum-potassium-sulfate",
  "slug": "aluminum-potassium-sulfate",
  "name": "Aluminum potassium sulfate",
  "identifiers": {
    "e_number": "E522",
    "ins_number": null,
    "cas_number": "10043-67-1",
    "inchikey": "GRLPQNLYRHEGIJ-UHFFFAOYSA-J",
    "pubchem_cid": 24856
  },
  "functional_class": null,
  "summary": "Aluminium potassium sulfate, a form of alum, is a firming agent used in pickles and a component of some baking powders.",
  "derivation_summary": "Crystallised from aluminium sulfate and potassium sulfate together.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "permitted",
      "status_label": "Permitted",
      "provision_count": 1,
      "provisions": [
        {
          "status": "permitted",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 182.1129",
            "url": "https://www.ecfr.gov/current/title-21/section-182.1129"
          },
          "source": "ecfr",
          "retrieved_at": "2026-09-07T18:25:51.549Z"
        }
      ]
    },
    {
      "jurisdiction": "CODEX",
      "jurisdiction_name": "Codex Alimentarius",
      "authority": "Codex Alimentarius Commission / JECFA",
      "status": "not_listed",
      "status_label": "Not listed",
      "note": "Does not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.",
      "provision_count": 0,
      "provisions": []
    }
  ],
  "names": [
    {
      "name": "10043-67-1",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": "15007-61-1",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": "7784-24-9",
      "type": "cas",
      "source": "openfoodtox"
    },
    {
      "name": "09OXB01F3O",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Alaun",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "AlK(SO4)2",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Alum potassium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Alum, N.F.",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Alum, potassium anhydrous",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Alumen",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminium potassium bis(sulphate)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminium potassium sulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "aluminium potassium sulfate (1/1/2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINIUM POTASSIUM SULFATE (1:1:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminium potassium sulfate, anhydrous",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminium potassium sulphate",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Aluminium potassium sulphate anhydrous",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "ALUMINIUM POTASSIUM-SULFATE DODECAHYDRATE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "aluminium(3+) ion potassium disulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium disulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUM POTASSIUM SULFATE (1:1:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum Potassium Sulfate (1:1:2) Dodecahydrate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate (AlK(SO4)2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate (KAl(SO4)2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate, alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate, anhydrous",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Aluminum potassium sulfate, puriss., anhydrous, calcined, >=98% (calc with ref. to anhyd. subst.), powder",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUM POTASSIUM SULPHATE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUM POTASSIUM SULPHATE (1:1:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUM POTASSIUM SULPHATE ANHYDROUS",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "ALUMINUMPOTASSIUMSULFATE",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Bestmade Natural Products Alum (Kali Alum Sulph)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CCRIS 6842",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Dialuminum dipotassium sulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E 522",
      "type": "common",
      "source": "openfoodtox"
    },
    {
      "name": "Exsiccated alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 2685",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS NO.522",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "INS-522",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Kalinite",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "NHS CONSTIPATION",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potash alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "POTASH-ALUM",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium alum anhydrous",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium Aluminium Sulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium aluminum alum",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "potassium aluminum disulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium aluminum sulfate",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Potassium aluminum sulfate (1:1:2)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "POTASSIUM-ALUM",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "POTASSIUM-ALUM-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Rxhomeo Homeopathic Combo",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sulfuric acid, aluminium potassium salt (2:1:1)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tai-Ace K 150",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tai-Ace K 20",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "E522",
      "type": "e_number",
      "source": "openfoodtox"
    },
    {
      "name": "aluminum;potassium;disulfate",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "aluminum;potassium;disulfate;dodecahydrate",
      "type": "iupac",
      "source": "openfoodtox"
    },
    {
      "name": "Aluminum potassium sulfate",
      "type": "label",
      "source": "ecfr"
    }
  ],
  "hazard_reference_values": [],
  "sources": [
    {
      "key": "ecfr",
      "name": "Electronic Code of Federal Regulations, Title 21",
      "publisher": "U.S. Government Publishing Office / National Archives",
      "licence": "Public domain",
      "url": "https://www.ecfr.gov/api/versioner/v1/full/2026-08-31/title-21.xml",
      "retrieved_at": "2026-09-07T18:25:51.549Z"
    }
  ],
  "citation_policy": "Cite as: Food Additive Index, \"Aluminum potassium sulfate\", https://foodadditiveindex.com/additives/aluminum-potassium-sulfate. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.405Z"
}