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MESOGENIC PITCH is a PITCH with a complex mixture of numerous essentially aromatic hydrocarbons. It does not contain anisotropic particles detectable by optical microscopy. MESOGENIC PITCH is low in quinoline‐insoluble fractions and capable of transforming into MESOPHASE PITCH during continuous heat treatment above 750 K by the formation of optically detectable CARBONACEOUS MESOPHASE.

See: CARBONACEOUS MESOPHASE, MESOPHASE PITCH, PITCH.