Barium chromate (or barium chromate oxide or chromic acid barium) is a fine light yellow powder with the formula BaCrO₄.
It is very insoluble in water, but is soluble in acids:
2 BaCrO₄ + 2 H⁺ 2 Ba²⁺ + Cr₂O7^2- + H₂O
It is used in some pyrotechnic compositions, especially delay compositions, as an oxidizer.

We are currently having the exterior of some copper coils finished with Luster-On Cobra C conversion coating to prevent cosmetic discoloration during humidity exposure. Does anyone know of any military/commercial/industrial specifications - along the lines of ASTM B912 or Mil-C-5541 - that could be called out on our part drawings to specify this finish