A guanidine type compound has the following formula: ##STR1## wherein R.sup.1 to R.sup.8 are each a hydrogen atom, an alkyl group, an amino group, an alkoxy group, a substituted or unsubstituted aryl group, and R.sup.1 to R.sup.8 may be the same as or different from each other and together may form a ring with the adjacent substituents; X is a halogen atom, a hydroxyl group or an alkoxy group; and m and n are each an integer having a value of 1 to 8. The guanidine compound is employed in a toner for electrostatic development and the toner can be used in an electrophotographic apparatus including a facsimile apparatus for receiving image information from an electrophotographic copier.
一种
胍类化合物具有以下式子:##STR1##其中R.sup.1到R.sup.8分别是氢原子、烷基、
氨基、烷氧基、取代或未取代的芳基,且R.sup.1到R.sup.8可以相同或不同,并且可以与相邻的取代基一起形成环;X是卤素原子、羟基或烷氧基;m和n分别是1到8的整数。该
胍化合物用于静电开发的色调剂,色调剂可用于包括从静电复印机接收图像信息的传真设备在内的电子照相设备中。