Sigma-Aldrich Ammonium iron(II) sulfate hexahydrate

product line

BioUltra

Quality Level

100

assay

≥99.0% (RT)

impurities

insoluble matter, passes filter test

pH

2.5-4.0 (25 °C, 0.5 M in H₂O)

mp

100 °C (dec.) (lit.)

solubility

H₂O: 0.5 M at 20 °C, clear, faintly yellow-green

anion traces

chloride (Cl^-): ≤10 mg/kg
phosphate (PO₄^3-): ≤20 mg/kg

cation traces

Cd: ≤5 mg/kg
Co: ≤50 mg/kg
CR: ≤50 mg/kg
Cu: ≤5 mg/kg
Fe³⁺: ≤50 mg/kg
K: ≤50 mg/kg
mg: ≤100 mg/kg
Mn: ≤500 mg/kg
Na: ≤50 mg/kg
Ni: ≤100 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

N.N.O.O.O.O.O.O.[Fe++].OS([O-])(=O)=O.OS([O-])(=O)=O