Dichloroacetic acid (DCA)
CAS: 79-43-6 | Type: disinfection_byproduct
High Risk (Adults)
Safety Summary
Hazard Profilehazardous
Risk (Adults)High
Risk (Children)High
Regulatory Status
SummaryIARC: Group 2B | California Prop 65 listed
Molecular FormulaC2H2Cl2O2
Molecular Weight128.94
Food Safety Thresholds (Baby Food)
CA_Prop65 — SubstanceNo level set (safe_harbor_level)
Governance status, not safety advice — see the full coverage-gap & legal-force matrix.
Sources
These citations are the ones recorded for the human adult context.
- where to look IARC Monographs Volume 84: Some Drinking-water Disinfectants and Contaminants, Including Arsenic — Dichloroacetic Acid Group 2B, Trichloroacetic Acid Group 2B (upgraded to 2B in Vol 106, 2014; Group 3 in this Vol 84), MX Group 2B (2004) REGULATORY · 2004
- US EPA: Stage 2 Disinfectants and Disinfection Byproducts Rule (40 CFR Parts 141 and 142) — TTHM MCL 80 μg/L, HAA5 MCL 60 μg/L, Locational Running Annual Average, BDCM Cancer Risk Assessment, Bladder Cancer Epidemiology (2006) REGULATORY · 2006
- Dichloroacetic acid | CASRN 79-43-6 | DTXSID2020428 | IRIS | US EPA, ORD REGULATORY
- Guidelines for drinking-water quality: fourth edition incorporating the first, second and third addenda REGULATORY
- PROPOSITION 65 LIST OF CARCINOGENS OR REPRODUCTIVE TOXICANTS REGULATORY · 2026
- IARC Monographs, List of Classifications REGULATORY · 2026
- Substances Listed in the Fifteenth Report on Carcinogens REGULATORY
- ECHA Annex VI to CLP: the unofficial Excel table (up to and including the 23rd ATP) (secondary: unofficial by its own statement) REGULATORY
- identity database ECHA CHEM, Download all substances: REACH registrations (ECHA's own list of REACH-registered substances) REGULATORY · 2026
- where to look PubChem: Toxicity section (CID 6597) PUBCHEM
- Permissible Exposure Limits – OSHA Annotated Table Z-1 REGULATORY
- where to look CAMEO Chemicals, as recorded by PubChem (Experimental Properties, CID 6597; where-to-look, not a source of this value) DATABASE · 2026
- where to look Hazardous Substances Data Bank (HSDB), as recorded by PubChem (Experimental Properties, CID 6597; where-to-look, not a source of this value) DATABASE · 2026
- EPA CompTox CTX API: predicted properties for DTXSID2020428 (Dichloroacetic acid (DCA)) REFERENCE
Same data as the API response, which is open and needs no key. The full per-record source list is available to authenticated callers.
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