Explanatory notes
… acids, nitrous fumes) are eliminated by distillation and hot air. Nitric acid is a colourless or yellowish toxic … etc.), organic dyes, explosives (nitroglycerol, collodion cotton, trinitrotoluene, picric acid, mercury fulminate, … of nitrocellulose and explosives. The heading does not cover : (a) Aminosulphonic acid (sulphamic acid) ( …