Barium chromate, also known as barium tetraoxochromate (VI), is a yellow solid compound with the chemical formula BaCrO4. It can be created by reacting barium hydroxide in the presence of sodium azide to create barium chromate(V). The reaction releases oxygen and water.
Synthesis and IUPAC identification of barium chromate
Barium dichromate was first synthesized and analysed by Vauquelin in 1836. It is a pale-yellow solid powder that was widely used as a paint pigment.
It was used as a coloring agent by the ceramic industry. In addition, it was used in ignition control devices as a coating.
The oxidizing properties of barium chromate have been tested for carcinogenicity in Porton Wistar rats (52 females/48 males). Rats were exposed for up to 2 years to 2 mg of the test compound in stainless steel mesh pellets surgically implanted in the left inferior bronchiolus. The results showed that a single dose of the test compound had no adverse effects on mortality rate, body weights or incidence of bronchial carcinomas or non-lung tumors.
Historic manufacturing of 19th century barium chromate, zinc (4ZnCrO4*K2O*3H2O) and strontium chromates by Winsor & Newton
Access to the W&N 19th century archive database provided unique insights into their production processes for yellow chromate pigments based on barium, zinc and strontium. One hundred and three production records were identified for lemon yellow (barium chromate, 69%), citron yellow (zinc potassium chromate, 25%) and strontian yellow (strontium chromate, 6%).
Inquiry us