Utilizing the method outlined by WHO (2009) Analysis performed by: RiskSciences.net, LLC
Calculation is straightforward whereas the dermal LD50 for permethrin is divided by the weight fraction (0.52%) of permethrin in the formulated product.
a) Limit value, i.e., 2000mg/kg, is consistent with dermal toxicity and MSDS for technical active ingredient.
Calculation shows that Insect Shield application is 192.3 X below any level of concern for dermal exposure. Oral exposure is not listed since it is not possible to ingest numerous completed textiles products such as shirts and pants.