On 27 October 2017, the Office of Environmental Health Hazard Assessment (OEHHA) of California added N,N-dimethylformamide, 2-mercaptobenzothiazole and tetrabromobisphenol A as chemicals known to cause cancer to Proposition 65 list.
On 10 November 2017, two more substances Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) as chemical known to cause reproductive toxicity was added to the list under Proposition 65.
| Chemical | CAS No. | Endpoint |
| Perfluorooctanoic acid (PFOA) | 335-67-1 | Developmental toxicity |
| Perfluorooctane sulfonate (PFOS) | 1763-23-1 | Developmental toxicity |
| N,N-Dimethylformamide | 68-12-2 | Cancer |
| 2-Mercaptobenzothiazole | 149-30-4 | Cancer |
| Tetrabromobisphenol A | 79-94-7 | Cancer |
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