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

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 ...

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.