Barium Chromate

Barium chromate is an inorganic compound with the chemical formula BaCrO4. It is a yellow crystalline solid that is insoluble in water and most organic solvents. Barium chromate is commonly used as a pigment in paints, plastics, and ceramics due to its bright yellow color and high thermal stability.

Barium chromate has a tetragonal crystal structure, with each barium ion surrounded by eight oxygen atoms in a distorted cube arrangement. The chromium atom is located in the center of an octahedral arrangement of oxygen atoms.

Barium chromate is highly toxic and poses a significant health hazard if ingested or inhaled. It is classified as a hazardous substance by regulatory agencies such as the United States Environmental Protection Agency (EPA) and the European Union (EU).

When heated, barium chromate decomposes to form oxygen gas and solid barium oxide and chromium oxide. This reaction is exothermic and can be dangerous if not properly controlled.

Overall, barium chromate is a useful but potentially dangerous compound that should be handled with care and only by trained professionals.