can't read?
Copper nitrate also occurs as five different hydrates, the most common ones being the trihydrate and hexahydrate. These materials are more commonly encountered in commerce than in the laboratory.
C 2685 (OTTO) Cupric nitrate, 98% Cas 10031-43-3 - used for laboratory purposes. C 2685 (OTTO) Cupric nitrate, 98% Cas 10031-43-3 - used to demonstrate chemical voltaic cell reactions in schools.