Abstract: A zinc benzoate compound represented by the following general formula: ##STR1## wherein R.sub.1 represents an alkyl or aralkyl group; and R.sub.2 and R.sub.3, independently from each other, each represent an alkyl, aralkyl, aryl, alkoxy or acyl group, an amino group which may be substituted, a nitro group or a halogen atom. The compound of the general formula (1) is colorless, highly stable and has excellent dispersibility in a binder resin for an electrophotographic toner, and can impart excellent frictional electrification properties to a toner, therefore being useful particularly as a charge control agent for an electrophotographic toner.

Abstract: A compound having the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom, an alkyl group having from 1 to 22 carbon atoms, an unsubstituted or substituted aromatic group having from 6 to 20 carbon atoms and an aralkyl group having from 7 to 20 carbon atoms, and A.sup..crclbar. is a molybdic acid anion, a tungstic acid anion or a heteropolyacid anion containing molybdenum or tungsten atoms.

Abstract: A compound having the formula: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom, an alkyl group having from 1 to 22 carbon atoms, an unsubstituted or substituted aromatic group having from 6 to 20 carbon atoms and an aralkyl group having from 7 to 20 carbon atoms, and A.sup..crclbar. is a molybdic acid anion, a tungstic acid anion or a heteropolyacid anion containing molybdenum or tungsten atoms.

Abstract: A symmetric 2:1 metal complex represented by the general formula: ##STR1## where R is a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an alkoxycarbonyl group having from 2 to 5 carbon atoms, an acyl group having from 2 to 5 carbon atoms, an aminocarbonyl group, an alklyaminocarbonyl group having from 2 to 5 carbon atoms, an alkylsulfonyl group having from 1 to 3 carbon atoms, an aminosulfonyl group, an acylamino group having from 2 to 5 carbon atoms, a nitro group, a cyano group or a halogen atom, m is an integer of from 1 to 4, when m is 2 or more, the plurality of R may be the same or different substituents, Q is --NHCO--Y--Z or --CONH--Y--Z (where Y is an alkylene group having from 1 to 4 carbon atoms, and Z is a quaternary ammonium group), M is a chromium atom or a cobalt atom, and X.sup..crclbar. is an anion.

Abstract: A novel process for the dyeing of modified polyester fibers containing sulfonate group, as well as mixed fibers and union fabrics thereof with other fibrous materials with cationic dyestuff is provided. The dyeing is carried out in the presence of one or more of aliphatic dicarboxylic acid diesters containing 8 to 14 carbon atoms. The resulting dyeings possess an outstanding fastness properties especially fastness to light.