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Sigma-Aldrich

Iron(II) sulfate heptahydrate

greener alternative

ACS reagent, ≥99.0%

Synonym(s):

Ferrous sulfate heptahydrate

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About This Item

Linear Formula:
FeSO4 · 7H2O
CAS Number:
7782-63-0
Molecular Weight:
278.01
EC Number:
231-753-5
MDL number:
MFCD00149719
UNSPSC Code:
12352302
PubChem Substance ID:
329752167
NACRES:
NA.21

grade

ACS reagent

Quality Level

200

vapor pressure

14.6 mmHg ( 25 °C)

assay

≥99.0%

form

powder or crystals

reaction suitability

reagent type: catalyst
core: iron

greener alternative product characteristics

Catalysis
Learn more about the Principles of Green Chemistry.

sustainability

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impurities

≤0.01% insolubles
≤0.05% Substances not pptd by NH4OH

pH

3-4 (25 °C, 50 g/L)

density

1.898 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤0.001%

cation traces

Cu: ≤0.005%
Fe3+: ≤0.1%
Mn: ≤0.05%
Zn: ≤0.005%

greener alternative category

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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General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for catalysis. Click here for more information.

Application

Iron(II) sulfate heptahydrate is used as a catalyst for greener amide bond formation from amines and aldehydes. It has been used in the synthesis of maghemite nanoparticles.

Iron-Catalyzed Efficient Synthesis of Amides from Aldehydes and Amine Hydrochloride Salts

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

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

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Iron(II) sulfate hydrate puriss., meets analytical specification of Ph. Eur., BP, exsiccated, 86.0-89.0% FeSO4 basis

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Sigma-Aldrich

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Iron(II) sulfate hydrate (about 87% FeSO₄) extra pure Ph.Eur.,BP,USP

SAFC

1.03967

Iron(II) sulfate hydrate

Synthesis and characterization of γ-Fe2O3 nanoparticles for applications in magnetic hyperthermia.
Avram A, et al.
Synthesis, 10(P151), 1-1 (2011)
Thermal analysis of iron (II) sulphate heptahydrate in air. V: Thermal decomposition of hydroxy and oxysulphates.
Swamy M and Prasad T.
Journal of Thermal Analysis and Calorimetry, 20(1), 107-114 (1981)
Thermal analysis of iron (II) sulphate heptahydrate in air: III. Thermal decomposition of intermediate hydrates.
Swami MSR and Prasad TP.
Journal of Thermal Analysis and Calorimetry, 19(2), 297-304 (1980)
Roshini Ebenezer et al.
Tropical medicine & international health : TM & IH, 18(8), 942-951 (2013-07-11)
To assess the impact of deworming and iron supplementation on the cognitive abilities and educational achievement of school-age children in Sri Lanka. Prospective, placebo-controlled randomised study. The treatment group received deworming and weekly iron supplementation for 6 months; the control group
Huifang Wu et al.
Journal of hazardous materials, 243, 86-94 (2012-11-13)
An experiment was conducted in a batch reactor for a real printing and dyeing wastewater pretreatment using Fenton process in this study. The results showed that original pH, hydrogen peroxide concentration and ferrous sulfate concentration affected ORP value and pretreatment
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