Toner for developing electrostatic latent image, charge control agent for use in the toner, and process for preparing the charge control agent

摘要

A toner for developing an electrostatic latent image is disclosed, which contains as a charge control agent a trivalent chromium salt of salicylic acid or a derivative thereof represented by the following general formula; <CHEM> wherein R<1>, R<2> and R<3> each represents a hydrogen atom, a saturated or unsaturated, straight or branched alkyl group or, when taken together, R<1> and R<2> or R<2> and R<3> form a fused ring optionally having a saturated or unsaturated, straight or branched alkyl group, and n represents 0, 1 or 2. The trivalent chromium salts are formed by adding an aqueous solution of alkali metal salt of salicylic acid or a derivative thereof having a pH of 6.5 to less than 7.0 to an aqueous solution of a chromium (III) halide having a pH of 3.0 to 5.8. <IMAGE>