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Ferrous chloride

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Ferrous chloride

EINECS 231-843-4
CAS No. 7758-94-3 Density 3.16 g/mL at 25 °C(lit.)
PSA 0.00000 LogP -5.99450
Solubility N/A Melting Point 677 °C(lit.)
Formula FeCl2 Boiling Point 1023 °C
Molecular Weight 126.753 Flash Point 1023oC
Transport Information UN 3260 8/PG 3 Appearance greenish white crystalline solid
Safety 26-36/37/39-45 Risk Codes 22-34
Molecular Structure Molecular Structure of 7758-94-3 (Ferrous chloride) Hazard Symbols CorrosiveC

Ferrous chloride (FeCl2);Iron dichloride;Iron protochloride;Iron(2+) chloride;Iron(II)chloride;Iron chloride;

Article Data 3

Ferrous chloride Synthetic route

silver(I) chloride



In solid matrix mixt. of metal (tenfold excess) and AgCl heated in Ar (400 Torr) until react. was complete; cooled, evacuated, co-condensed with solid matrix (N2, Ar);

iron monochloride


chromium (II) chloride



chromium monochloride




In neat (no solvent, gas phase) equilibrium reaction was studied at 1349-1596 K;




In neat (no solvent) isolation in N2 solid matrix;

carbon monoxide



In neat (no solvent) FeCl2 vapor cocondensed with argon doped with CO;

Ferrous chloride Consensus Reports

Ferrous chloride(7758-94-3) is reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Ferrous chloride Standards and Recommendations

OSHA PEL: TWA 1 mg(Fe)/m3
ACGIH TLV: TWA 1 mg(Fe)/m3
DOT Classification:  8; Label: Corrosive

Ferrous chloride Specification

The Ferrous chloride with CAS registry number of 7758-94-3 is also called Iron chloride. The IUPAC name is dichloroiron. Its EINECS registry number is 231-843-4. In addition, the molecular formula is Cl2Fe and the molecular weight is 126.75. It is a kind of off-white solid and belongs to the class of Inorganics. And it is soluble in water, methanol and ethanol, and slightly soluble in acetone and benzene. But it is insoluble in ether. What's more, it should be stored in sealed container, and put in a cool and dry place.

Preparation of Ferrous chloride: it can be prepared by ferric chloride and dry hydrogen. The equation as follows: 2FeCl3 + H2 → 2FeCl2 + 2HCl. In addition, it can be obtained from hydrochloric acid and iron. The equation as follows: Fe + 2HCl → FeCl2 + H2. Besides, it is conveniently prepared by addition of iron powder to a solution of methanol and concentrated hydrochloric acid under an inert atmosphere. An alternative laboratory synthesis of FeCl2 entails the reaction of FeCl3 with chlorobenzene: 2FeCl3 + C6H5Cl → 2FeCl2 + C6H4Cl2 + HCl.

Uses of Ferrous chloride: it can be used as a reducing flocculating agent in wastewater treatment, especially for wastes containing chromate. And it can be used for mordant, analytical reagent and unleaded gasoline additives. In addition, it can react with two molar equivalents of [(C2H5)4N]Cl to give the salt [(C2H5)4N]2[FeCl4].

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful if swallowed and can cause burns. During using it, wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.).

You can still convert the following datas into molecular structure:
(1)SMILES: Cl[Fe]Cl
(2)InChI: InChI=1/2ClH.Fe/h2*1H;/q;;+2/p-2

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 59mg/kg (59mg/kg)   Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 244, Pg. 17, 1962.
rat LD50 oral 450mg/kg (450mg/kg)   Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 39(5), Pg. 16, 1974.

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