Iron(III) sulfate

Iron(III) sulfate
Names
	IUPAC name Iron(III) sulfate
	Other names Ferric sulfate
Identifiers
CAS Number	10028-22-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:53438 ;
ChemSpider	23211 ;
ECHA InfoCard	100.030.054
PubChem CID	24826;
RTECS number	NO8505000;
UNII	4YKQ1X5E5Y ;
CompTox Dashboard (EPA)	DTXSID5029712 ;
	InChI InChI=1S/2Fe.3H2O4S/c;;31-5(2,3)4/h;;3(H2,1,2,3,4)/q2+3;;;/p-6 Key: RUTXIHLAWFEWGM-UHFFFAOYSA-H ; InChI=1/2Fe.3H2O4S/c;;31-5(2,3)4/h;;3(H2,1,2,3,4)/q2+3;;;/p-6 Key: RUTXIHLAWFEWGM-CYFPFDDLAR;
	SMILES [Fe+3].[Fe+3].[O-]S(=O)(=O)[O-].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O;
Properties
Chemical formula	Fe2(SO4)3
Molar mass	399.88 g/mol (anhydrous); 489.96 g/mol (pentahydrate) ; 562.00 g/mol (nonahydrate)
Appearance	grayish-white crystals
Density	3.097 g/cm3 (anhydrous) ; 1.898 g/cm3 (pentahydrate)
Melting point	480 °C (896 °F; 753 K) (anhydrous)(decomposes) ; 175 °C (347 °F) (nonahydrate)
Solubility in water	256 g/L (monohydrate, 293 K)
Solubility	sparingly soluble in alcohol ; negligible in acetone, ethyl acetate ; insoluble in sulfuric acid, ammonia
Refractive index (nD)	1.814 (anhydrous) ; 1.552 (nonahydrate)
Hazards
NFPA 704 (fire diamond)	1 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	500 mg/kg (oral, rat)
	NIOSH (US health exposure limits):
REL (Recommended)	TWA 1 mg/m3
Related compounds
Other anions	Iron(III) chloride; Iron(III) nitrate
Related compounds	Iron(II) sulfate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Iron(III) sulfate or ferric sulfate (British English: sulphate instead of sulfate) is a family of inorganic compounds with the formula Fe₂(SO₄)₃(H₂O)_n. A variety of hydrates are known, including the most commonly encountered form of "ferric sulfate". Solutions are used in dyeing as a mordant and as a coagulant for industrial wastes. Solutions of ferric sulfate are also used in the processing of aluminum and steel.