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| like or containing an alkali, which neutralize acids to form salts and turn red litmus paper blue, or having a pH value greater than 7 |
| a compound capable of changing state or becoming inactive when subjected to heat or radiation |
| blue vitriol | |
| —n | |
| the fully hydrated blue crystalline form of copper sulphate | |
| blue vitriol
A blue, crystalline compound of copper sulfate. Blue vitriol is soluble in water, and is a very important industrial salt of copper. It is used in insecticides and germicides, in electrolytes for batteries, and in electroplating baths. Chemical formula: CuSO4·5H2O. |