… to this sub-Chapter, this heading covers the metal salts of sulphuric acid (H 2 SO 4 ) (heading 28.07), but excludes mercury sulphates which fall in heading 28.52, ammonium sulphate which, even pure, falls in heading 31.02 or 31.05 and potassium …
… (1) Hydrogen fluoride (HF). Obtained by the action of sulphuric acid on natural calcium fluoride (fluorite) or on cryolite. It is … (sulphamic acid) (SO 2 (OH)NH 2 ). Obtained by dissolving urea in sulphuric acid, sulphur trioxide or oleum; …
… the specific gravity of accumulator or other acid); urinometers; etc. Others are named after the inventor (e.g., … butyrometers (for determining the fatty content of butter), ureometers (for testing urea content); these are classified in heading 70.17 . (B) …
… unfused pyrazole ring (whether or not hydrogenated) in the structure : 2933.11 - - Phenazone (antipyrin) and its … or piperazine ring in the structure : 2933.52 - - Malonylurea (barbituric acid) and its salts 2933.53 - - Allobarbital (INN), …
… only (+). - Compounds containing an unfused furan ring (whether or not hydrogenated) in the structure : 2932.11 - - Tetrahydrofuran 2932.12 - - 2-Furaldehyde (furfuraldehyde) 2932.13 - - Furfuryl alcohol …
… here are : (1) Ammonium chloride (sal ammoniac, ammonium muriate) (NH 4 Cl). Results from the neutralisation of … or in powder, flowers or cakes obtained by sublimation. Colourless when pure, otherwise yellowish; soluble in water. Its uses …
… pyroligneous acid), but is mainly obtained by synthesis. Colourless liquid with an agreeable ether‑like odour. Used in numerous organic syntheses, for the … (2) Butanone (methyl ethyl ketone) (CH 3 COC 2 H 5 ). Colourless liquid found in the by‑products of the …
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