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12354

Sigma-Aldrich

Iron(II) sulfate heptahydrate

puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, 99.5-104.5% (manganometric)

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Synonym(s):
Ferrous sulfate heptahydrate
Linear Formula:
FeSO4 · 7H2O
CAS Number:
Molecular Weight:
278.01
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

vapor pressure

14.6 mmHg ( 25 °C)

Quality Level

grade

puriss.

assay

99.5-104.5% (manganometric)

form

crystals

quality

meets analytical specification of Ph. Eur., BP, USP, FCC

shelf life

Shelf life is limited

reaction suitability

reagent type: catalyst
core: iron

impurities

organic volatile impurities, complies (GC)
residual solvents, complies
≤0.005% heavy metals (as Pb)

pH

3-4 (20 °C, 5%)

density

1.898 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤100 mg/kg

cation traces

As: ≤2 mg/kg
Ca: ≤200 mg/kg
Cr: ≤50 mg/kg
Cu: ≤30 mg/kg
Fe3+: ≤2000 mg/kg
Hg: ≤1 mg/kg
K: ≤20 mg/kg
Mg: ≤200 mg/kg
Mn: ≤1000 mg/kg
Na: ≤100 mg/kg
Ni: ≤50 mg/kg
Pb: ≤2 mg/kg
Zn: ≤20 mg/kg

suitability

complies for appearance of solution

SMILES string

O.O.O.O.O.O.O.[Fe++].[O-]S([O-])(=O)=O

InChI

1S/Fe.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2

InChI key

SURQXAFEQWPFPV-UHFFFAOYSA-L

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1 of 4

This Item
F7002F8633F8263
vibrant-m

12354

Iron(II) sulfate heptahydrate

Essential Grade
vibrant-m

F7002

Iron(II) sulfate heptahydrate

-
vibrant-m

F8633

Iron(II) sulfate heptahydrate

Essential+ Grade
vibrant-m

F8263

Iron(II) sulfate heptahydrate

-
form

crystals

form

powder

form

-

form

-

assay

99.5-104.5% (manganometric)

assay

≥99%

assay

≥99%

assay

≥99%

density

1.898 g/mL at 25 °C (lit.)

density

1.898 g/mL at 25 °C (lit.)

density

1.898 g/mL at 25 °C (lit.)

density

1.898 g/mL at 25 °C (lit.)

cation traces

As: ≤2 mg/kg, Cr: ≤50 mg/kg, Fe3+: ≤2000 mg/kg, K: ≤20 mg/kg, Mn: ≤1000 mg/kg, Ni: ≤50 mg/kg, Zn: ≤20 mg/kg, Cu: ≤30 mg/kg, Mg: ≤200 mg/kg, Pb: ≤2 mg/kg, Ca: ≤200 mg/kg, Na: ≤100 mg/kg, Hg: ≤1 mg/kg

cation traces

-

cation traces

-

cation traces

-

anion traces

chloride (Cl-): ≤100 mg/kg

anion traces

-

anion traces

-

anion traces

-

General description

Iron(II) sulfate heptahydrate is a heptahydrate of iron(II) sulfate. It undergoes thermal degradation to afford hydrosulfate and oxysulfate of iron(III). Isothermal and dynamic thermal analysis methods have been proposed to study its thermal decomposition in air.

Application

Iron(II) sulfate heptahydrate (FeSO4.7H2O) may be used in the synthesis of maghemite nanoparticles.

Packaging

bottled under inert gas

Caution

tends to oxidation by air

pictograms

Exclamation mark

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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