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Hazard 9 P 3 B 3 T 3 Risk Moderate


The T-value in the score for hazard refers to acute toxicity. Underlying data for P, B, T and risk are from Fass Nix (permethrin) (downloaded 2013-09-03). No new environmental information for permethrin is published on Fass.se (2018-09-06). It is voluntary for manufacturers to provide information about environmental impact on Fass.se.

Fass environmental information

Fass environmental information for Nix (permethrin) (downloaded 2013-09-03).


Persistence: The half-life of soil degradation is 5-55 days. It is indicated that permethrin is slowly degraded in the environment.

Bioaccumulation: Permethrin has a high potential for bioaccumulation (BCF 400-20 000 [fish]). The substance has high log KOW (6.5 i 25°C) and the properties are confirmed in studies on e.g. fish.

Acute toxicity: There is data for 3 trophic levels, lowest for crustacean (D. magna) 0.0001 mg/L.


PEC/PNEC is based on sales data in Sweden "in the last year" (unclear what year it means). PEC/PNEC = 1.7 which gives the risk moderate.


  1. Stockholms läns landsting. Miljöklassificerade läkemedel 2014–2015. Stockholm; 2014.

Author: Health and Medical Care Administration, Region Stockholm