Heptachlor ヘプタクロル
Organochlorines (banned or expired): DDT, BHC, drins and others. Because they hardly break down and remain in the body and the environment, they stopped being used in Japan in the 1970s.
In Japan
- Registration
- Its registration as a pesticide expired on August 9, 1972 (first registered April 24, 1957). It can no longer be used as a pesticide in Japan.
- ADI (acceptable daily intake)
- No risk assessment report by the Food Safety Commission of Japan was found
- ARfD (acute reference dose)
- not evaluated
- Evaluation
- Food Safety Commission of Japan, July 29, 2013
ADI: the amount considered to have no effect on health even if eaten every day for a lifetime. ARfD: the amount considered to have no effect on health when eaten at one time (within 24 hours). Both are set by the Food Safety Commission of Japan, mainly from animal studies.
In Japan's national residue testing (fiscal 2024)
| Produce | Detected / tested | Detection rate | Over the limit |
|---|---|---|---|
| Domestic | 0 / 1,931 | 0.0% | 0 |
| Imported | 1 / 3,370 | 0.0% | 1 |
Found in imported foods: other mushrooms (max. 0.02 ppm)
Tests are counted as pesticide × sample. Any detection counts as “detected” — it does not mean the limit was exceeded. For pesticides outside the top 20, figures are summed from the food-by-food tables of the full report.
Evaluations abroad
- WHO acute toxicity class
- O (Obsolete (not classified))Based on the toxicity of the undiluted active ingredient given once, mainly to rats by mouth (LD50 = the dose that kills half; the smaller, the stronger the acute toxicity). It is not an assessment of the safety of residues in food.
- EU
- Not approved in the EU
- IARC (carcinogenicity)
- Group 2B (possibly carcinogenic to humans)Heptachlor: Vol. Suppl. 7, 53, 79 (evaluated 2000)IARC classifications rate the strength of evidence that something can cause cancer, not the size of the risk at the amounts eaten in food.
Related explainers
Sources
- FAMIC (Food and Agricultural Materials Inspection Center), pesticide registration information (as of Sept. 30, 2026) (Japanese)
- Food Safety Commission of Japan, risk assessment report on Heptachlor (July 29, 2013) (Japanese)
- MHLW, results of pesticide residue testing in foods, fiscal 2024 (Japanese)
- Consumer Affairs Agency, daily intake survey of pesticide residues in foods, fiscal 2024 (Japanese)
- WHO Recommended Classification of Pesticides by Hazard 2019
- EU Pesticides Database (Heptachlor)
- IARC (International Agency for Research on Cancer) List of Classifications
Last checked 2026-10-01. Registrations and evaluations change over time. This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.