Okwu mmeghe: Ferrous sulfate heptahydrate, nke a na-akpọkarị akwụkwọ ndụ akwụkwọ ndụ alum, bụ ngwakọta inorganic nwere usoro FeSO4 · 7H2O.A na-ejikarị emepụta nnu ígwè, ink, magnetik iron oxide, onye na-eme ka mmiri dị ọcha, ihe na-egbu egbu, ihe na-akpata ígwè;A na-eji ya dị ka coal dye, tanning agen ...
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