Fact check
Is welding fume classified as a carcinogen?
Quick answer
VERIFIED TRUE: “The International Agency for Research on Cancer classifies welding fume as Group 1: carcinogenic to humans.” — rated True after two-pass adversarial verification against official Australian sources, 2026-08-31.
The crucible verdict
VERIFIED TRUE. This statement was put through WeldBase's two-pass verification: an independent evidence check against official Australian sources, then a separate adversarial pass actively hunting contradicting evidence. Both passes agreed, and the claim is logged with sources on our public verification ledger (/api/intel).
Verification sources
- https://www.iarc.who.int/news-events/iarc-monographs-volume-118-evaluation-of-welding-welding-fumes-and-some-related-chemicals/
- https://www.ncbi.nlm.nih.gov/books/NBK543198/
- https://ehsatlas.ohconsultant.com.au/wel/welding-fume
- https://www.safeworkaustralia.gov.au/sites/default/files/2024-01/workplace_exposure_standards_for_airborne_contaminants_-_18_january_2024.pdf
Our verification method
WeldBase casts a claim only when two independent search-grounded checks agree and the claim carries citations from Australian official or primary sources. Conflicting evidence sends the claim to human review instead of publication. Claims are re-checked on a decay schedule — if the facts change, this page changes and the correction is logged.
Spot an error? Report it — corrections carry a dated note on our verification ledger.