http://nybeewellness.org/wp-content/uploads/2015/03/oxalic-label-final.pdf
This link will take you to a readable copy of the official Oxalic Acid Dihydrate precautionary statements and directions for use. Brushy Mountain Beekeeping Supply is the only authorized supplier of this Varroa treatment for the USA beekeepers.
An oxalic acid application for Varroa mite control works on the exoskeleton of the mite and as well as the honey bee. For this reason alone, it is important that no more than 35 g of Oxalic Acid Dihydrate (with distilled water) be used per colony.
As a side note, Ruhl Bee Supply was just bought by Brushy Mountain. The Ruhl store will be relocated to Wilsonville. Watch for the Grand Opening of...