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.
Chemical formula:Na2CrO4
Molar mass: 161.97 g/mol
Appearance: yellow crystals
Odor: odorless
Density: 2.698 g/cm3
Melting point: 792 °C (1,458 °F; 1,065 K) (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)
Magnetic susceptibility (χ):+55.0·10−6 cm3/mol
Crystal structure:orthorhombic
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. 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.
Handling: Requires protective gear, including gloves, eye protection, and masks, as it is highly toxic and corrosive.
Storage: Store in a tightly sealed container in a dry, well-ventilated area away from acids and combustible materials.
Spillage: Clean spills immediately with appropriate protective equipment, avoiding direct contact and inhalation of dust.
VI HALBLEITERMATERIAL GmbH (VIMATERIAL) employs a stringent quality assurance system to ensure the reliability of our product quality. Strict quality control is implemented throughout the entire production chain, and for defective products, we strictly enforce the principle of rework and redo. Each batch is released only after passing detailed specification tests.
Every batch of our materials is independently tested, and, if necessary, we send samples to certified companies for testing. We provide these documents and analysis certificates with the shipment to certify that our products meet the required standards.
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