Ammonium Ferrous Sulfate


Product
:
AMMONIUM FERROUS SULFATE 6-HYDRATE
(AMMONIUM IRON(II) SULFATE 6-HYDRATE)
Available Grades
:
LR/EP, AR/GR, and ACS
Mol. Formula
:
(NH4)2Fe(SO4)2.6H2O
Mol. weight
:
392.14
CAS No.
:
7783-85-9


SPECIFICATIONS
:


Sr.
PARAMETER


PARAMETER VALUE
LR / EP
AR / GR
ACS
1. Appearance : Pale-greenish fine Crystals
2. Test Solution (10% w/v, water)
: The solution is clear & pale greenish
3.
Assay
:
99% min.
99.0% min. 98.5 - 101.5%
4.
pH (5% w/v, water)
:
3.5 min.
3.5 min.
--
5.
Maximum limits of impurities


i.
Water insoluble matter :
--
0.003%
0.01%
ii.
Chloride, as Cl : 0.002%
0.001%
--
iii.
Phosphate, as PO4 : --
--
0.001%
iv.
Calcium, as Ca : --
0.01%
0.005%
v.
Copper, as Cu : 0.002%
0.002%
0.003%
vi.
Ferric ion, as Fe+3 (See Note-1) : 0.03%
0.02%
0.01%
vii.
Heavy Metals, as Pb
: 0.002%
0.002%
--
viii.
Magnesium, as Mg
: --
--
0.002%
ix.
Manganese, as Mn
: --
0.05%
0.01%
x.
Potassium, as K
: --
0.01%
0.002%
xi.
Sodium, as Na
: --
0.01%
0.02%
xii.
Zinc, as Zn
:
--
0.003%
0.003%

Note-1
: Due to inherent oxidation, Fe+3 content may increase on storage

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