Chromate

The chromium atoms are in oxidation state +6 in both, and the chromate and dichromate ions are fairly strong oxidizing agents. Chromium in the +6 (or VI) oxidation state is often referred to as hexavalent chromium.

· In an aqueous solution, chromate and dichromate anions are in a chemical equilibrium.
2 CrO₄^2- + 2 H₃O⁺

Cr₂O₇^2- + 3 H₂O

- Barium Chromate
- Magnesium Chromate
- Lithium Chromate
- Sodium Chromate

- Copper Chromate
- Ammonium Chromate
- Potassium Chromate

Barium Chromate

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.

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Copper Chromate

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

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Magnesium Chromate

Cas	13423-61-5	Boiling Point °C	211.5
Density G/Cm3	1.695	Crystal Structure	Rhomb

Catalog No.	Product Description	Purity %	Particle Size	Cost Per Pound
MG-401	magnesium chromate powder, yellow to red	99.8	n/a	1-2, 3-10, 11-25, 26-100 inquire

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