Iron(II) oxalate
-oxalate-sample.jpg) | |
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| Names | |
|---|---|
| IUPAC name
Iron(II) oxalate | |
| Other names
Iron oxalate Ferrous oxalate | |
| Identifiers | |
516-03-0  6047-25-2 (dihydrate) | |
| 3D model (Jmol) | Interactive image |
| ECHA InfoCard | 100.007.472 |
| EC Number | 208-217-4 |
| PubChem | 10589 |
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| Properties | |
| FeC2O4 (anhydrous) FeC2O4·2 H2O (dihydrate) | |
| Molar mass | 143.86 g/mol (anhydrous) 179.89 g/mol (dihydrate) |
| Appearance | yellow powder |
| Odor | odorless |
| Density | 2.28 g/cm3 |
| Melting point | 190 °C (374 °F; 463 K) (anhydrous)[1] 150–160 °C (302–320 °F; 423–433 K) (dihydrate) decomposes |
| Boiling point | 365.1 °C (689.2 °F; 638.2 K) (anhydrous)[1] |
| dihydrate: 0.097 g/100ml (25 °C)[2] | |
| Hazards | |
| GHS pictograms |  [3] |
| GHS signal word | Warning |
| H302, H312[3] | |
| P280[3] | |
| EU classification (DSD) |
 Xn |
| R-phrases | R21/22 |
| S-phrases | S24/25 |
| Flash point | 188.8 °C (371.8 °F; 461.9 K) |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
Ferrous oxalate, or iron(II) oxalate, is a chemical compound consisting of one iron(II) ion (Fe2+) and one oxalate ion (C2O42−). It has the chemical formula FeC2O4.
Iron(II) oxalate is more commonly encountered as the dihydrate, FeC2O4·2H2O, CAS # 6047-25-2. Its crystal structure consists of chains of oxalate-bridged iron atoms, capped by water molecules.[4]
(H2O)2-chain-from-xtal-2008-CM-3D-balls.png)
When heated, it dehydrates and decomposes into carbon dioxide, carbon monoxide, iron oxides and pyrophoric black iron. [5]
Safety
Iron(II) oxalate is harmful when swallowed. It may cause irritation to eyes and skin.
See also
A number of other iron oxalates are known
References
- 1 2 http://www.guidechem.com/cas-516/516-03-0.html
- ↑ http://chemister.ru/Database/properties-en.php?dbid=1&id=2084
- 1 2 3 Sigma-Aldrich Co., Iron(II) oxalate dihydrate. Retrieved on 2014-05-03.
- ↑ Echigo, Takuya; Kimata, Mitsuyoshi (2008). "Single-crystal X-ray diffraction and spectroscopic studies on humboldtine and lindbergite: weak Jahn–Teller effect of Fe2+ ion". Phys. Chem. Minerals. 35: 467–475. doi:10.1007/s00269-008-0241-7.
- ↑ Hermanek, Martin; Zboril, Radek; Mashlan, Miroslav; et al. (2006). "Thermal behaviour of iron(II) oxalate dihydrate in the atmosphere of its conversion gases". J. Mater. Chem. 16: 1273–1280.
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