Abstract: A process for the production of a compound of formula ##STR1## which comprises reacting a compound of formula ##STR2## or a mixture of the compounds (2a) and (2b) with a compound ZH or a compound of formula ##STR3## or a mixture of the compounds (2c) and (2d) with a compound YH, both reactions under acidic conditions, wherein X and Y are the same or different and each represents an aromatic carbocyclic radical having an unsubstituted or substituted amino group in the para position to the indicated bond, or a heterocyclic group, and Z represents an aryl radical of formula ##STR4## wherein R.sub.1 and R.sub.2 independently of one another represent hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.2 -C.sub.8 -alkoxyalkyl, cycloalkyl, aralkyl, aryl, or substituted alkyl, cycloalkyl, aralkyl or aryl, or R.sub.1 and R.sub.

Abstract: A solid color former composition is produced in a low-dusting form by admixture with 0.1 to 10% by weight, based on the weight of the color former, of an organic hydrophobic liquid or low melting solid, which does not react with the color former.

Abstract: A process for the production of a sulphinate of formula ##STR1## which comprises reacting a compound of formula ##STR2## or a mixture of the compounds of formulae (2a) and (2b) with a compound of formulaY--SO.sub.2 --M (3)in an organic solvent in the presence of a mineral acid or organic acid and, optionally, also of water, wherein Ar.sub.1 and Ar.sub.2 are the same or different and each represents an unsubstituted or substituted aromatic carbocyclic radical.R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another represent hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.8 -alkoxyalkyl, cycloalkyl, aralkyl, aryl, or substituted alkyl, cycloalkyl, aralkyl or aryl, or each of the pairs of substituents (R.sub.1 and R.sub.2) and (R.sub.3 and R.sub.4), together with the nitrogen atom to which said pair is attached, independently, represents a heterocyclic ring, or one of several of the substituents R.sub.1, R.sub.2, R.sub.3 and R.sub.4 with the nitrogen and an adajcent carbon atom of the residue Ar.

Abstract: A liquid dyestuff composition, especially suitable for dyeing paper, comprises:(a) 5-40% by weight of a dyestuff having the formula: ##STR1## wherein X is hydrogen or an alkali metal cation, n represents an integer from 1 to 2, Q and Q.sub.1 together form a fused benzene or naphthalene residue, and Y is a residue having the formula ##STR2## whereby ring A, the fused residue formed by Q and Q.sub.1, or the residue Y can each be further substituted by one or more alkyl, alkoxy, hydroxy, carboxy or dehydrothio-p-toluidine groups or halogen atoms;(b) 1-10% by weight of an alkali metal hydroxide;(c) 45-75% by weight of a polyhydric alcohol or a water-soluble ether thereof; and(d) 0-40% by weight of water.