Fair, slowly effloresces in the air.
Water and methyl alcohol; slightly in ethyl alcohol and glycerol.
Laboratory grade copper(II) sulfate pentahydrate powder contains up to 0.7% of an insoluble anticaking agent, magnesium carbonate. This additive is very effective in preventing clumping and hardening of the chemical and makes the powder free-flowing. If a transparent solution is needed, filter the mixture before use or add a small amount of 1 M hydrochloric acid.