Pigments through the Ages - Manufacture Recipes

How Cobalt violet is made:

In the lab
Materials needed:	Cobalt(II)chloride (CoCl₂·6H₂O) and sodium hydrogenphosphate (NaH₂PO₄·10H₂O)
Safety (MSDSs):	cobalt(II) chloride (at Fisher Scientific)
Method:	2 g of cobalt chloride and 1,3 g of sodium hydrogenphosphate are each solved in 20 ml deionized water, the solutions are poured together and the resulting precipitate is filtered off.

Making cobalt violet in the lab


Cobalt(II) chloride and sodium hydrogenphosphate	Solutions of both salts

Precipitation reaction	The precipitate of cobalt(II) phosphate is being filtered off