Violet

On this page is information about violet colours. These are:

• Cobalt Violet
• Manganese Violet

Cobalt Violet

Use - Paint pigment

Formula - Co₃(PO₄)₂

Chemical Name - Cobalt phosphate

Structure - Monoclinic

Synthesis - An aqueous solution of cobalt chloride is mixed with an aqueous solution of sodium hydrogen phosphate. The resultant precipitate is filtered.

Interesting Facts - n/a

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Manganese Violet

Use - Paint pigment

Formula - Na₄MnP₂O₇

Chemical Name - Ammonium mangenese phosphate

Structure - n/a

Synthesis - React a mixture of phosphoric acid, ammonium dihydgrogen orthophosphate and manganese oxide at <236°C.

Interesting Facts - Also used to colour cosmetics eg: mascara, eye shadow, lipstick and nail varnish. Manganese violet is also used to colour plastics.

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