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215406

Sigma-Aldrich

Ammonium iron(II) sulfate hexahydrate

ACS reagent, 99%

Synonym(s):

Ammonium ferrous sulfate hexahydrate, Ammonium iron(II) sulfate, Mohr’s salt

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$53.20
500 G
$177.30

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100 G
$53.20
500 G
$177.30

About This Item

Linear Formula:
(NH4)2Fe(SO4)2 · 6H2O
CAS Number:
7783-85-9
Molecular Weight:
392.14
EC Number:
233-151-8
MDL number:
MFCD00150530
UNSPSC Code:
12352302
PubChem Substance ID:
329752166
NACRES:
NB.24
assay:
98.5-101.5%
99%
grade:
ACS reagent
form:
powder or crystals

$53.20

Available to ship onApril 22, 2025Details

Request a Bulk Order

grade

ACS reagent

Quality Level

200

assay

98.5-101.5%
99%

form

powder or crystals

reaction suitability

reagent type: catalyst
core: iron

impurities

≤0.01% insolubles
≤0.05% Not NH4OH pptd.

pH

3-5 (20 °C, 50 g/L)

mp

100 °C (dec.) (lit.)

anion traces

phosphate (PO43-): ≤0.003%

cation traces

Ca: 0.005%
Cu: ≤0.003%
Fe3+: ≤0.01%
K: 0.002%
Mg: 0.002%
Mn: ≤0.01%
Na: 0.02%
Zn: ≤0.003%

SMILES string

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

InChI

1S/Fe.2H3N.2H2O4S.6H2O/c;;;2*1-5(2,3)4;;;;;;/h;2*1H3;2*(H2,1,2,3,4);6*1H2/q+2;;;;;;;;;;/p-2

InChI key

MQLVWQSVRZVNIP-UHFFFAOYSA-L

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Application

Ammonium iron(II) sulfate hexahydrate can be used as a green catalyst in the:
  • Newman-Kwart rearrangement to synthesize functionalized thiophenols.
  • Oxidation of aromatic, aliphatic, and conjugated aldehydes to the corresponding carboxylic acids.
  • Synthesis of biscoumarins via condensation reaction.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX6501
MKCX5668
MKCX1477
MKCV8028
MKCV4609

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The crystal structure of Tutton's salts. VI. Vanadium (II), iron (II) and cobalt (II) ammonium sulfate hexahydrates.
Montgomery H, et al.
Acta Crystallographica, 22(6), 775-780 (1967)
Mixed ligand complexes of iron (II) and (III) with cyanide and aromatic di-imines.
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