> I do not recall seeing that kind of admonition when using Formic in its other formulations.

This is from the packaging:

Mite-Away II
Single Application Formic Acid Pad
For Treatment of Honey Bees Infested with Varroa or Tracheal Mites
Active Ingredient
Formic Acid…………………… 48.4%
Other Ingredients…………………...51.6%
Total……………………….......100.0%

Handler Personal Protective Equipment (PPE): 

Applicators and other handlers must wear coveralls over a long-sleeved shirt, long pants, socks and shoes, acid resistant gloves (PVC, neoprene, or nitrile), and protective eyewear. Wear a respirator with an organic-vapor removing cartridge with a prefilter approved for pesticides (MSHA/NIOSH approval number prefix TC-23C), or a canister approved for pesticides (MSHA/NIOSH approval number prefix TC-14G), or a NIOSH approved respirator with an organic vapor (OV) cartridge or canister with any N, R, P or HE prefilter. Clean or replace PPE at end of each day’s work period. Rinse off pesticides at rest breaks. etc

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