Method of producing gallium phthalocyanine crystal and method of producing electrophotographic photosensitive member using the method of producing gallium phthalocyanine crystal

A method of producing a gallium phthalocyanine crystal, comprising

• providing a low-crystalline hydroxygallium phthalocyanine treated by an acid pasting method;
• providing a dispersion by dispersing the low-crystalline hydroxygallium phthalocyanine and an amine compound represented by the following formula (1) into an amide solvent or a sulfoxide solvent, and
• subjecting the dispersion to a milling treatment to conduct a crystal transformation of the low-crystalline hydroxygallium phthalocyanine, and obtaining a hydroxygallium phthalocyanine crystal containing the amine compound represented by the formula (1) in the crystal:
• and
• wherein in the formula (1):
• R1 to R10 each independently represent a hydrogen atom, a halogen atom, an aryloxycarbonyl group, a substituted or unsubstituted acyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, an amino group having a substituent, or a substituted or unsubstituted cyclic amino group, provided that at least one of R1 to R10 represents an amino group substituted with a substituted or unsubstituted aryl group, an amino group substituted with a substituted or unsubstituted alkyl group, or a substituted or unsubstituted cyclic amino group;
• and
• X1 represents a carbonyl group or a dicarbonyl group.