Several toothpastes use crystals of copper phthalocyanine, a blue pigment that also acts as a whitening agent. This pigment ...

The team focused on a substance called copper phthalocyanine. This blue pigment is commonly found in many commercial toothpastes and works as a whitening agent by coating the teeth with its crystals.

J. W. Menter 1 succeeded for the first time in observing the lattice structure and the edge dislocation contained in it in crystals of metal phthalocyanines. This method is also applicable to the ...