Explanatory notes
… magnesium sulphate (MgSO 4 .7H 2 O) (Epsom salts, Seidlitz salts) obtained by purifying kieserite, or by the … water with avidity. Used as a fungicide in agriculture (see Explanatory Note to heading 38.08); for preparing … (with 9 H 2 O). Used for purifying natural waters or sewage, for coagulating blood in slaughterhouses, in …