Question

Which unstable, combustible material is used in the production of explosives, matches and electric batteries, as well as in etching copper, in manufacturing coloured glass, in the leather industry, in dyeing, and as an antiseptic?

Answer 1

Picric acid
Picric acid, also called 2,4,6-trinitrophenol, is a pale yellow, odourless crystalline solid, first identified in 1771. It was used as a yellow dye, initially for silk, beginning in 1849, and in 1886 as a bursting charge for shells under the name of melinite.