This is also from the E.P.A. R.E.D Fact page
http://www.epa.gov/oppsrrd1/REDs/factsheets/4070fact.pdf
All pesticides sold or used in the United States must be registered by
EPA, based on scientific studies showing that they can be used without
posing unreasonable risks to people or the environment. Because of
advances in scientific knowledge, the law requires that pesticides which
were first registered years ago be reregistered to ensure that they meet
today's more stringent standards.
Quote:
Oxalic acid is registered for use as a disinfectant to control bacteria
and germs, and as a sanitizer, in toilet bowls, urinals and bathroom
premises. Registered products are formulated as ready-to-use liquids or
solid soluble concentrates, and are applied by sprinkling, pouring, brushing,
swabbing or mopping the product onto the surface to be treated.
Oxalic acid also has many diverse, non-pesticidal, manufacturing and
industrial uses including use in fabric printing and dyeing; bleaching straw
hats; removing paint, varnish, rust or ink stains; and cleaning wood.
Regulatory
History
Oxalic acid first was registered as a pesticide in 1957 for the current
bathroom disinfectant uses, as well as use in swimming pool water systems,
drainage systems, sewage systems, eating establishments (to disinfect
equipment and utensils), and other sites. At present, five products
containing oxalic acid are registered.
End Quote
Basically OA has been and still is registered as a disinfectant. Including the disinfecting of food service utensils.
I am wondering if anyone has ever submitted a request for it to be registered as a treatment for bees. Or if they care.
Also from the same source.
Although they contain only a small amount of oxalic acid and a much
greater amount of other active and inert ingredients, oxalic acid products as
formulated and registered for use as bathroom disinfectants can be highly
irritating and damaging to the eyes, skin and mucous membranes. Exposure
to the concentrated formulations can result in chemical burns to the skin and
severe to permanent eye damage. However, these risks should be low as
long as product label directions and precautions are followed.
The pesticide oxalic acid will not result in unreasonable adverse
effects to human health or the environment, and all registered products
containing oxalic acid are eligible for reregistration. These products will be
reregistered once the required product-specific data and revised labeling are
received and accepted by EPA.