Typically calcium carbonate is included in the mixture to improve oxygen access and to keep silicon and aluminium impurities in an insoluble form.

[2] Subsequent to its formation, the chromate salt is converted to sodium dichromate, the precursor to most chromium compounds and materials.

[3] The industrial route to chromium(III) oxide involves reduction of sodium chromate with sulfur.

It converts to sodium dichromate when treated with acids: Further acidification affords chromium trioxide: 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.

[7] Human exposure further encompasses impaired fertility, heritable genetic damage and harm to unborn children.