Definition of dichromate in US English:

dichromate

noun

Chemistry
  • A salt, typically red or orange, containing the anion Cr₂O₇²⁻.

    • ‘The breath sample is bubbled in one vial through a mixture of sulfuric acid, potassium dichromate, silver nitrate and water.’
    • ‘The most regularly employed oxidizing agent for this set of reactions is a mixture called chromic acid, a mixture of sodium or potassium dichromate and sulfuric acid.’
    • ‘Certain salts, such as the dichromates, borates, and silicates, act as inhibitors to the aqueous corrosion of zinc.’
    • ‘Potassium dichromate is an oxidizer and therefore presents a fire hazard.’
    • ‘Common oxidants include the halogens (especially fluorine and chlorine), oxygen, ozone, potassium permanganate, potassium dichromate, nitric acid, and concentrated sulfuric acid.’

Origin

Mid 19th century: from di- ‘two’ + chromate.

Pronunciation

dichromate

/daɪˈkroʊmeɪt//dīˈkrōmāt/