{
  "$schema": "https://foodadditiveindex.com/api/v1/schema.json",
  "id": "https://foodadditiveindex.com/additives/thiourea",
  "slug": "thiourea",
  "name": "Thiourea",
  "identifiers": {
    "e_number": null,
    "ins_number": null,
    "cas_number": null,
    "inchikey": "UMGDCJDMYOKAJW-UHFFFAOYSA-N",
    "pubchem_cid": 2723790
  },
  "functional_class": null,
  "summary": "Thiourea was investigated as a food preservative and antioxidant. It is prohibited from use in human food in the United States.",
  "derivation_summary": "Manufactured from ammonium thiocyanate or by reacting hydrogen sulfide with cyanamide. Its uses today are industrial rather than alimentary.",
  "regulatory_status": [
    {
      "jurisdiction": "US",
      "jurisdiction_name": "United States",
      "authority": "Food and Drug Administration",
      "status": "prohibited",
      "status_label": "Prohibited",
      "provision_count": 1,
      "provisions": [
        {
          "status": "prohibited",
          "food_category": null,
          "max_level": null,
          "max_level_unit": null,
          "conditions": null,
          "effective_from": null,
          "citation": {
            "ref": "21 CFR 189.190",
            "url": "https://www.ecfr.gov/current/title-21/section-189.190"
          },
          "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": "17356-08-0",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": "62-56-6",
      "type": "cas",
      "source": "pubchem"
    },
    {
      "name": ".beta.-Thiopseudourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "2-Thio-Pseudourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "2-Thio-Urea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "2-Thiopseudourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "2-Thiourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "aminothioamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "aminothiocarboxamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "beta-Thiopseudourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Carbamimidothioic acid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "carbonothioic diamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CAS-62-56-6",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Caswell No. 855",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "CCRIS 588",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "EPA Pesticide Chemical Code 080201",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "GYV9AM2QAG",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "HSDB 1401",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Isothiourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Propylthiouracil EP Impurity A",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "PROPYLTHIOURACIL IMPURITY A [EP IMPURITY]",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Pseudothiourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Pseudourea, 2-thio-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "RCRA waste no. U219",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "RCRA waste number U219",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "sulfocarbamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sulfourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sulfouren",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Sulourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "thio-urea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiocarbamid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiocarbamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiocarbonic acid diamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiocarbonic diamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thioharnstoff",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiokarbamid",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiomocovina",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "thiopseudourea",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "THIOUREA",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea ACS Reagent Grade",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, 99%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, >=99.999% (metals basis)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "THIOUREA, ACS",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, ACS reagent, >=99.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, JIS special grade, >=98.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, LR, >=98%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, p.a., ACS reagent, 99.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea, ReagentPlus(R), >=99.0%",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea-(1)N2",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea-1?N2",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea; Propylthiouracil EP Impurity A",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "thiourea; thiocarbamide",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiuronium",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "TOU",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Tsizp 34",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Urea, 2-thio-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Urea, thio-",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Urea, thio- (8CI)",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "USAF EK-497",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "WLN: ZYZUS",
      "type": "common",
      "source": "pubchem"
    },
    {
      "name": "Thiourea",
      "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, \"Thiourea\", https://foodadditiveindex.com/additives/thiourea. This site reports regulatory status and does not rate additives.",
  "generated_at": "2026-09-08T00:09:38.746Z"
}