Explanatory notes
… (MgSO 4 .7H 2 O) (Epsom salts, Seidlitz salts) obtained by purifying kieserite, or by the action of sulphuric acid on … other thiazode dyestuffs. Used also for clarifying tallow, purifying industrial water, in fire extinguishers, etc. … and the mixture (with slaked lime and sawdust) used for purifying coal gas; in dyeing; as a disinfectant, an …