Sodium chromate
| |
| |
| Names | |
|---|---|
| IUPAC name
Sodium chromate
| |
| Other names
Chromic acid, (Na2CrO4), disodium salt
Chromium disodium oxide Rachromate | |
| Identifiers | |
| ECHA InfoCard | 100.028.990 |
| EC Number |
|
PubChem CID
|
|
| RTECS number |
|
| UN number | 3288 |
CompTox Dashboard (EPA)
|
|
| Properties | |
| Na2CrO4 | |
| Molar mass | 161.97 g/mol |
| Appearance | yellow crystals |
| Density | 2.698 g/cm3 |
| Melting point | 762 °C |
| 53 g/100 ml (20 °C) | |
| Structure | |
| orthorhombic (hexagonal above 413 °C) | |
| Thermochemistry | |
Std enthalpy of
formation (ΔfH⦵298) |
−1329 kJ/mol |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Other anions
|
Sodium dichromate Sodium molybdate Sodium tungstate |
Other cations
|
Potassium chromate Calcium chromate Barium chromate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Sodium chromate (Na2CrO4) is a yellow solid chemical compound used as a corrosion inhibitor in the petroleum industry,[1] a dyeing auxiliary in the textile industry,[1] as a wood preservative,[2] and as a diagnostic pharmaceutical in determining red blood cell volume.[3]
It is obtained from the reaction of sodium dichromate with sodium hydroxide. It is hygroscopic and can form tetra-, hexa-, and decahydrates. Sodium chromate, like other hexavalent chromium compounds, can be carcinogenic.[1]
The substance is a strong oxidant. It is soluble in water,[4] producing a weakly basic solution.[5]
See also
References
- ^ a b c Gerd Anger, Jost Halstenberg, Klaus Hochgeschwender, Christoph Scherhag, Ulrich Korallus, Herbert Knopf, Peter Schmidt, Manfred Ohlinger. "Chromium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a07_067. ISBN 978-3527306732.
{{cite encyclopedia}}: CS1 maint: multiple names: authors list (link) - ^ "Sodium chromate - Pesticide use statistics for 2005". PAN Pesticides Database. Retrieved 2008-06-20.
- ^ Bracco Diagnostics Inc. "chromitope sodium (Sodium Chromate, Cr 51) injection, solution". DailyMed. Retrieved 2008-06-20.
- ^ "Sodium chromate". inchem. Retrieved 2008-06-20.
- ^ "GESTIS-Stoffdatenbank — Natriumchromat". BG-Institute for Occupational Safety and Health. Retrieved 2008-06-20.
 | This inorganic compound–related article is a stub. You can help Wikipedia by expanding it. |