Check the listing for details. Ferrous Ammonium Sulfate Hexahydrate, ACS, 98.5+%, 500g. Condition: New. Listed at 59.95 USD. Synonyms: Ammonium ferrous sulfate hexahydrate, Ammonium iron(II) sulfate, Mohr’s salt, Ammonium iron(II) sulfate hexahydrateCAS: 7783-85-9Molecular Formula: Fe(NH4)2(SO4)2 · 6H2OMolecular Weight: 392.14 g/molTestSpecificationDescriptionPale-green mixture of fine crystals & larger regular piecesAssay [Fe(NH4)2(SO4)2 · 6H2O]98.5 to 101.5%Calcium (Ca)0.005% max.Copper (Cu)0.003% max.Magnesium (Mg)0.002% max.Ferric Iron (Fe+3)0.01% max.Insoluble Matter0.01% max.Manganese (Mn)0.01% max.pH of 5% Solution at 25°C3.0 to 5.0Potassium (K)0.002% max.Sodium (Na)0.02% max.Phosphate (PO4)0.003% max.Zinc (Zn)0.003% max.This item will be shipped in accordance with FedEx/UPS carriers, per DOT 49CFR regulations, which will meet or exceed all of USPS regulations per 49CFR 172.101, published in Federal Register 10742. Note: eBay please do not delist.