Chlorfenapyr クロルフェナピル
Other insecticides: Classes that fit none of the above (phenylpyrazoles, pyridine azomethines and others).
In Japan
- Registration
- Registered as a pesticide (first registered April 25, 1996). 5 formulated products contain it.
- Main registered crops
- fuki (butterbur), spinach, apple, mikan (mandarin orange), grape, peach and others (106 crop names in the registered uses)
- Toxicity class
- Active ingredient: Deleterious (ordinary at 0.6% or less)Classes of the 5 formulated products (diluted products sold): deleterious substance 3, ordinary substance 2Classes under Japan's Poisonous and Deleterious Substances Control Act.
- ADI (acceptable daily intake)
- 0.026 mg per kg of body weight per day
- 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 |
|---|---|---|---|
| DomesticNo. 10 by detection rate | 120 / 4,118 | 2.9% | 0 |
| Imported | 93 / 4,117 | 2.3% | 0 |
Found in domestic foods: strawberry, turnip roots, cucumber (including gherkin), komatsuna (Japanese mustard spinach), shungiku (garland chrysanthemum), other brassica (Brassicaceae) vegetables, other citrus fruits, other Asteraceae vegetables, other nightshade (Solanaceae) vegetables, other vegetables, eggplant, Welsh onion (including leek) and others (max. 1 ppm)
Found in imported foods: komatsuna (Japanese mustard spinach), ginger, other Apiaceae vegetables, other nightshade (Solanaceae) vegetables, other fruits, other vegetables, carrot, Welsh onion (including leek), okra, tomato, banana, bell pepper and others (max. 0.9 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
- II (Moderately hazardous), LD50 441 mg/kgBased 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 EUEU ADI: 0.015 mg/kg bw/day; ARfD: 0.015 mg/kg bw
- IARC (carcinogenicity)
- No matching entry in the IARC list (not evaluated or out of scope, including Group 3)
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 Chlorfenapyr (July 29, 2013) (Japanese)
- MHLW, results of pesticide residue testing in foods, fiscal 2024 (Japanese)
- WHO Recommended Classification of Pesticides by Hazard 2019
- EU Pesticides Database (Chlorfenapyr)
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.