Sodium chromate is the inorganic compound with the formula na2cro4.
It exists as a yellow hygroscopic solid, which can form tetra-, hexa-, and
Decahydrates. It is an intermediate in the extraction of chromium from its
Ores.
Sodium chromate, like other hexavalent chromium compounds, is toxic and
Carcinogenic.
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Aside from its central role in the production of chromium from its ores,
Sodium chromate is used as a corrosion inhibitor in the petroleum industry.
It is also a dyeing auxiliary in the textile industry and a wood preservative.
It is a diagnostic pharmaceutical in determining red blood cell volume.
In organic chemistry, sodium chromate is used as an oxidant, converting
Primary alcohols to carboxylic acids and secondary alcohols to ketones.
Properties
Chemical formula, na2cro4
Molar mass, 161.97 g/mol
Appearance, yellow crystals
Odor, odorless
Density, 2.698 g/cm3
Melting point, 792 c (anhydrous)
20 c (decahydrate)
Solubility in water, 31.8 g/100 ml (0 c)
84.5 g/100 ml (25 c)
126.7 g/100 ml (100 c)
Solubility, slightly soluble in ethanol
Solubility in methanol, 0.344 g/100 ml (25 c)
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