At a glance
| Chemical family | Organochlorine — chlorinated camphene mixture (complex pesticide) |
| CAS number | 8001-35-2 |
| Classification | IARC Group 2B (possibly carcinogenic to humans); Stockholm Convention Annex A (elimination); Canada SOR/2025-270 prohibited |
| Where you encounter it | Legacy agricultural contamination (cotton, soybeans, livestock); global atmospheric transport to remote regions; food chain (fish, particularly Great Lakes and Arctic); no direct home application |
| Sleep micro-environment relevance | Minimal direct bedroom relevance — toxaphene was not used for structural pest control. Exposure is primarily dietary (fish from contaminated waters) and through global atmospheric transport to remote regions |
Regulatory & certification status
| European Union | POP Regulation (EU) 2019/1021 — banned. Original dirty dozen Stockholm POP. Regulatory |
| United States | EPA cancelled all registrations (1990). CERCLA hazardous substance. California Proposition 65 listed (cancer). Regulatory |
| Canada | Prohibited under the Prohibition of Certain Toxic Substances Regulations, 2025 (SOR/2025-270), in force 30 June 2026. Regulatory — Canada authority |
| International | Stockholm Convention Annex A (elimination) — original dirty dozen POP. IARC Group 2B (possibly carcinogenic). Regulatory — International authority |
What it is
Toxaphene is not a single compound but a complex mixture of over 670 chlorinated bornane (camphene) congeners, produced by chlorinating camphene extracted from pine resin. It was the most heavily used insecticide in the United States by volume during the 1970s, applied primarily to cotton, soybeans, and livestock. The mixture is lipophilic, persistent, and subject to long-range atmospheric transport — it has been detected in Arctic air and fish thousands of kilometres from any application site. IARC classified toxaphene as Group 2B based on sufficient evidence of carcinogenicity in animals (liver and thyroid tumours) and inadequate evidence in humans.
Where it shows up in bedding
Toxaphene was not used in homes, buildings, or bedding products. Unlike chlordane and aldrin, it was strictly an agricultural and livestock pesticide. Its bedroom relevance is indirect: toxaphene is subject to long-range atmospheric transport and bioaccumulates in the food chain, particularly in fish. Dietary exposure through contaminated fish is the primary route for the general population. For most bedrooms, toxaphene is not a meaningful exposure source — but its presence in the Stockholm Convention dirty dozen reflects its global persistence.
Citations
- IARC (2001). Toxaphene. IARC Monographs Vol. 79. Source Peer-reviewed
- ATSDR (2014). Toxicological Profile for Toxaphene. Agency for Toxic Substances and Disease Registry. Source Regulatory
- Government of Canada. Prohibition of Certain Toxic Substances Regulations, 2025 (SOR/2025-270). Source Regulatory
Frequently asked questions
Was toxaphene used in homes?
No. Unlike chlordane, aldrin, and heptachlor, toxaphene was used exclusively in agriculture and on livestock — not for structural pest control. Its presence in indoor environments is negligible unless a home is located on or near former agricultural land that was heavily treated.
Why is toxaphene in the Stockholm Convention if it was only agricultural?
Toxaphene was the most heavily used insecticide in the US by volume, and its complex mixture of chlorinated camphenes is subject to long-range atmospheric transport — it has been found in Arctic air and fish thousands of kilometres from any application site. Its global persistence and ubiquity, not just local toxicity, drove its inclusion in the original dirty dozen POPs.
Related compounds
Embr is a sleep environment company researching and addressing the chemistry of the bedroom. Research and product development in progress.
Last reviewed 2026-07-07. If you find a factual error, contact us.