The present invention provides a novel PHA comprising a unit containing thioether
with high reactivity, and its production method. The present invention also provides
polyhydroxyalkanoate (PHA) comprising units having defined chemical formulas (1)
and (2), and at least one of four units having defined chemical formulas (3), (4),
(5) and (6); its production method; a charge control agent containing the PHA;
a toner binder containing the charge control agent; an electrostatic latent image
developing toner; and an image forming method and an image forming apparatus using
the electrostatic latent image developing toner.
