Iron(II) sulfide

CAS

1317-37-9

Catalog Number

ACM1317379

Category

Metal & Ceramic Materials

Molecular Weight

87.905g/mol

Molecular Formula

FeS;FeS;

MSDS COA Spec Sheet

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Specification

Synonyms

Iron(II) sulfide; Iron(II) sulfide, 99.9%, (trace metal basis), -100 mesh; Iron sulfide (FeS); Ferrous sulfide (FeS); Iron(II) sulfide, 29.0%; EC 215-268-6; Iron(II) sulfide (99.9%-Fe); Iron sulfide, troilite; Iron(II) sulfide, sticks, >=95% FeS basis; 8658AF;

IUPAC Name

sulfanylideneiron;

Canonical SMILES

S=[Fe];

InChI

InChI=1S/Fe.S;

InChI Key

MBMLMWLHJBBADN-UHFFFAOYSA-N;

Melting Point

1194 deg C;

Density

4.75;

Solubility

0.00062 G/100 CC WATER AT 18 DEG C; INSOL IN NITRIC ACID; SOL IN ACIDS WITH EVOLUTION OF HYDROGEN SULFIDE;

Application

Iron(II) sulfide reacts with acids evolving hydrogen sulfide:

FeS + 2HCl → H2S + FeCl2

The compound is readily oxidized under moist condition by action of air, forming triiron tetroxide and elemental sulfur:

3FeS + 2O2 → Fe3O4 + 3S

The above reaction is exothermic.

Iron(II) sulfide decomposes to its elements when heated above 1,100°C:

FeS → Fe + S

When heated with boiled water, it generates sulfuric acid and hydrogen:

4FeS + 8H₂O + 7O2 → 4H₂SO₄ + 4H2 + Fe2O3

Storage

Storage temperature: no restrictions.

Color/Form

Colorless hexagonal crystals when pure; usually gray to brownish-black lumps, rods or granular powder; trimorphic with transition points @ 135 and 325 deg C;Dark-brown or black metallic pieces, sticks, or granules;

Complexity

Covalently-Bonded Unit Count

Decomposition

When heated to decomposition it emits toxic fumes of /sulfur oxides/.;

EC Number

215-268-6

Exact Mass

87.907g/mol

H-Bond Acceptor

Heavy Atom Count

Monoisotopic Mass

87.907g/mol

Other Experimental

Decomposes in hot water;Oxidized by moist air to S and Fe3O4.;Standard molar enthalpy (heat) of formation at 298.15 deg K is -100.0 kJ/mol (crystal); Standard molar Gibbs energy of formation at 298.15 deg K is -100.4 kJ/mol (crystal); Standard molar entropy at 298.15 deg K is 60.3 J/mol/K (crystal); Molar heat capacity at constant pressure at 298.15 deg K is 50.5 J/mol/K (crystal);Molar enthalpy (heat) of fusion 31.5 kJ/mol at 1188 deg C;Sugar, glycerin, & many organic hydroxy acids hinder precipitation. In neutral solution, soluble carbonates, phosphates, & oxalates produce precipitation. /Ferrous salts/;

Stability

Oxidized by moist air to sulfur and iron oxide.;

Topological Polar Surface Area

32.1A^2

Ferrous Sulfide Activated Persulfate for Degradation of p-Chloroaniline

Yuan, Yanmei, et al. Chemical Engineering Journal, 2015, 268, 38-46.

Ferrous sulfide (FeS) is widely evaluated as a reducing media for the removal of metals and halogenated organics, while its activation role has received little attention. In fact, studies have shown that FeS can accelerate the degradation of p-chloroaniline (PCA) by supporting sustained oxidation through persulfate (PS) activation. That is, FeS can serve as an effective persulfate activator for PCA control.
Activation effect and mechanism of ferrous sulfide
· The enhanced effect of FeS is attributed to the supply and maintenance of appropriate Fe2+ concentrations for radical chain reactions.
· Fe2+ released gradually and sustainably from FeS is rapidly oxidized to Fe3+ through persulfate destruction.
· Recycling of Fe3+ to Fe2+ can prevent excessive Fe2+ consumption and Fe3+ accumulation.
· Low doses/concentrations of both FeS and PS greatly improved PCA degradation efficiency.
· PCA degradation rates followed the trend pH 7.0 > pH 5.0 > pH 3.0 > pH 9.0 > pH 11.0.
· Under suitable reaction conditions, PCA degradation increases with increasing FeS dose and persulfate concentration.

Iron(II) Sulfide as Additive for Long Cycle Life in Alkaline Batteries

Manohar, Aswin K., et al. Journal of The Electrochemical Society, 2015, 162(9), A1864..

Iron(II) sulfide can be introduced as an additive to improve long cycle life in iron-based alkaline rechargeable batteries, such as nickel-iron batteries and iron-air batteries. The role of iron (II) sulfide additives in iron electrode discharge is manifested in two aspects. On the one hand, the conductive phase of iron (II) sulfide prevents the iron electrode from rapid passivation during discharge. On the other hand, sulfide ions reduce the overpotential for the conversion of magnetite to metallic iron during charging.
Preparation of Iron Electrodes Containing Iron(II) Sulfide Additive
· Iron electrodes consisted of carbonyl iron powder (80 wt%), polyethylene powder (10 wt%) and potassium carbonate (10 wt%). The polyethylene powder and potassium carbonate served as the binder and pore former, respectively.
· In the carbonyl iron electrodes, bismuth sulfide, bismuth oxide or iron (II) sulfide were added to the extent of 5-10 wt% of the powder mixture. The iron electrodes were fabricated by hot-pressing the mixture on to a nickel grid at 140°C.

What is the molecular formula of Iron(II) sulfide?

The molecular formula of Iron(II) sulfide is FeS.

What is the molecular weight of Iron(II) sulfide?

The molecular weight of Iron(II) sulfide is 87.91 g/mol.

What is the IUPAC name of Iron(II) sulfide?

The IUPAC name of Iron(II) sulfide is sulfanylideneiron.

What is the InChI of Iron(II) sulfide?

The InChI of Iron(II) sulfide is InChI=1S/Fe.S.

What is the InChIKey of Iron(II) sulfide?

The InChIKey of Iron(II) sulfide is MBMLMWLHJBBADN-UHFFFAOYSA-N.

What is the canonical SMILES of Iron(II) sulfide?

The canonical SMILES of Iron(II) sulfide is S=[Fe].