for a very dry and technical
evaluation which concludes
"Permethrin is not classifiable as to its carcinogenicity
to humans (Group 3)."
This category is used most commonly for agents, mixtures and
exposure circumstances for which the evidence of carcinogenicity is
inadequate in humans and inadequate or limited in experimental
Exceptionally, agents (mixtures) for which the evidence of
carcinogenicity is inadequate in humans but sufficient in
experimental animals may be placed in this category when there is strong
evidence that the mechanism of carcinogenicity in experimental animals does not
operate in humans.
Agents, mixtures and exposure circumstances that do not fall
into any other group are also placed in this category. "
As for 'safe concentrations' remember,
"All substances are poisons; there is none which is not a
The right dose differentiates a poison?." Paracelsus
Most domestic products seem to be at around 2.5 - 5/0 g/kg
(roughly the same as ml/L).
www.apvma.gov.au/ may have some more
In the end it comes down to the trade off between malaria,
dengue etc and possible health effects of permethryn.