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Ammonium iron(III) sulfate dodecahydrate, for analysis, ExpertQ®, ACS, ISO

- Synonyms: Iron(III) ammonium sulfate, Alum iron, Ferric ammonium alum, Iron alumr- NH4Fe(SO4)2·12H2Or- M = 482,19 g/molr- CAS [7783-83-7]r- EINECS-No.: 233-382-4r- Solub. in water: (25 ºC): 1240 g/lr- Melting point: 39 - 41 ºCr- Tariff number: 2833 30 00 00r- Applications: analytical chemistry, laboratory reagent.rrSPECIFICATIONSrassay (iodometric): 99,0 - 102,0 %ridentity (IR-spectrum): passes testrinsoluble in water: max. 0,005 %rinsoluble in HCl : max. 0,01 %rchlorides (Cl): max. 5 ppmrnitrates (NO3): max. 0,01 %rcalcium (Ca): max. 0,01 %rcopper (Cu): max. 0,002 %riron (II) (Fe (II)): max. 0,001 %rlead (Pb): max. 10 ppmrmagnesium (Mg): max. 0,001 %rmanganese (Mn): max. 0,005 %rpotassium (K): max. 0,005 %rsodium (Na): max. 0,01 %rzinc (Zn): max. 0,003 % : r