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Molecular formula : MW : CAS :
nature : a divalent metal (M< sup> + / sup>) or ammonium ions (NH4 + ) and the three metals (< M3 + / sup>) sulfate salt water of the tributaries. Many types. Formula for M2 SO4 �M23 + + (SO4) 3 �24H2O . For example alum K2SO4 �Al2 (SO4) 3 �24H2O, iron ammonium sulfate (NH4) 2SO 4 Fe2 (SO4) 3 �24H2O, chromium alum (chromium potassium alum) K2SO4 �Cr2 (SOs _4) 3 �24H2O so.
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