> In the early 20th century, picric acid was stocked in pharmacies as an antiseptic and as a treatment for burns, malaria, herpes, and smallpox. Picric acid-soaked gauze was also commonly stocked in first aid kits from that period as a burn treatment.
On the slightly positive side, picric acid also sublimates, but I'm not sure how long it would take for evaporate from the first aid kit. On the other hand, sublimation also increases the surface area of any metal container for forming metallic picrates.
https://en.wikipedia.org/wiki/Picric_acid
> In the early 20th century, picric acid was stocked in pharmacies as an antiseptic and as a treatment for burns, malaria, herpes, and smallpox. Picric acid-soaked gauze was also commonly stocked in first aid kits from that period as a burn treatment.
On the slightly positive side, picric acid also sublimates, but I'm not sure how long it would take for evaporate from the first aid kit. On the other hand, sublimation also increases the surface area of any metal container for forming metallic picrates.