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221260

Sigma-Aldrich

Ammonium iron(III) sulfate dodecahydrate

ACS reagent, 99%

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Synonym(s):
Ammonium ferric sulfate dodecahydrate
Linear Formula:
NH4Fe(SO4)2 · 12H2O
CAS Number:
Molecular Weight:
482.19
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NB.24

grade

ACS reagent

Quality Level

assay

98.5-102.0% (ACS specification)
99%

form

crystals

reaction suitability

reagent type: catalyst
core: iron

impurities

≤0.01% insolubles
≤0.05% not NH4OH pptd.

pH

1 (25 °C, 482.2 g/L)

mp

39-41 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
nitrate (NO3-): ≤0.01%

cation traces

Cu: ≤0.003%
Fe2+:, passes test (limit about 0.001%)
Zn: ≤0.003%

storage temp.

2-8°C

SMILES string

N.O.O.O.O.O.O.O.O.O.O.O.O.[Fe+3].OS([O-])(=O)=O.[O-]S([O-])(=O)=O

InChI

1S/Fe.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3

InChI key

LCPUDZUWZDSKMX-UHFFFAOYSA-K

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This Item
F36291.03776215406
Ammonium iron(III) sulfate dodecahydrate ACS reagent, 99%

221260

Ammonium iron(III) sulfate dodecahydrate

Essential Grade
assay

98.5-102.0% (ACS specification), 99%

assay

≥99%

assay

99.0-102.0% (iodometric)

assay

98.5-101.5%, 99%

grade

ACS reagent

grade

-

grade

ACS reagent

grade

ACS reagent

cation traces

Cu: ≤0.003%, Zn: ≤0.003%, Fe2+:, passes test (limit about 0.001%)

cation traces

-

cation traces

Ca: ≤0.01%, Cu: ≤0.001%, Fe2+: ≤0.001%, K: ≤0.005%, Mg: ≤0.001%, Mn: ≤0.005%, Na: ≤0.01%, Pb: ≤0.0005%, Zn: ≤0.001%

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%

mp

39-41 °C (lit.)

mp

39-41 °C (lit.)

mp

39-41 °C

mp

100 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.001%, nitrate (NO3-): ≤0.01%

anion traces

-

anion traces

chloride (Cl-): ≤0.0005%, nitrate (NO3-): ≤0.01%

anion traces

phosphate (PO43-): ≤0.003%

Application

Ammonium ferric sulfate dodecahydrate may be used as a catalyst to synthesize:
  • Isoamyl acetate from acetic acid and isoamyl alcohol.
  • 2-Amino-5-(5-nitro-2-thienyl)-1,3,4-thiadiazole from 5-nitrothiophene-2-carboxaldehyde thiosemicarbazone via oxidative cyclization.

pictograms

Corrosion

signalword

Danger

hcodes

Hazard Classifications

Eye Dam. 1

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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