Explanatory notes
… It is a dense, oily liquid, colourless (if it does not contain impurities) or yellow or brown (in other cases). … in the preparation of fertilisers, explosives and inorganic pigments and, inter alia , in the petroleum and … thioindigo, alizarin derivatives, etc.). The heading does not include : (a) Chlorosulphuric acid (“sulphuric …