Abstract: Compounds of the general formula IA--B--A (I)where A is a radical of the formula ##STR1## and B is a bridge member of the formula ##STR2## and where R.sup.1 and R.sup.2 independently of one another are unsubstituted or hydroxy-, C.sub.1 -C.sub.4 -alkoxy-, cyano-, C.sub.1 -C.sub.4 -alkoxycarbonyl-, di-C.sub.1 -C.sub.4 -alkylamino-, chlorine- or bromine-substituted C.sub.1 -C.sub.4 -alkyl, cyclohexyl, benzyl, phenylethyl or phenyl, orR.sup.1 and R.sup.2 together with the nitrogen are morpholino, pyrrolidino, piperidino or N-methylpiperazino,R.sup.3 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy or nitro,R.sup.4 and R.sup.5 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl or benzyl,X is oxygen or imino andalkylene is of 2 to 6 carbon atoms and is linear or branched.The compounds of the formula I are particularly suitable for coloring paper pulps.

Abstract: A compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are unsubstituted or hydroxy substituted, C.sub.1 -C.sub.4 alkoxy substituted, cyano substituted, C.sub.1 -C.sub.4 alkoxycarbonyl substituted, di-C.sub.1 -C.sub.4 alkylamino substituted, (CH.sub.3)(C.sub.6 H.sub.5 CH.sub.2)NC.sub.2 H.sub.4 substituted, chlorine substituted or bromine substituted C.sub.1 -C.sub.4 -alkyl, cyclohexyl, benzyl, phenylethyl or phenyl, R.sup.1 and R.sup.2 together with the nitrogen are morpholino, pyrrolidino, piperidino or N-methylpiperazino;R.sup.3 is hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy or nitro;R.sup.4 and R.sup.5 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl or benzyl; X is oxygen or imino; A.sup.

Abstract: A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is(a) mixed with an amount, equivalent to the said dye, of a non-emulsifying, water-insoluble amine of a total of 12 to 40 carbon atoms, which forms, with the said dye, a salt which is sufficiently lipophilic for it to separate spontaneously from the aqueous phase,(b) the pH is brought to <5 with an acid and the batch is mixed thoroughly,(c) the two resulting phases of different density are separated, and(d) the phase which consists of the lipophilic ammonium salt of the dye is mixed, with or without prior washing with water, with a water-soluble base whose sulfonate salt is to be prepared, and with water, the resulting phases are separated, and the salt is left in the aqueous solution or is isolated therefrom.

Abstract: Photopolymerizable binders for printing inks, coatings and printing plates, based on olefinically unsaturated compounds, with or without a polymeric binder component, and containing a diaminobenzophenone compound as the photosensitizer, are improved in respect of their toxicity and shelf life if the diaminobenzophenone compound has the formula R.sup.1 R.sup.2 N--C.sub.6 H.sub.4 --CO--C.sub.6 H.sub.4 --NR.sup.3 R.sup.4, where R.sup.1 and R.sup.3 are H(OR.sup.5).sub.x radicals, R.sup.5 being alkylene of 2 or 3 carbon atoms and x being 1, 2 or 3, and R.sup.2 and R.sup.4 are each alkyl of 1 to 4 carbon atoms or are radicals of the type of R.sup.1 and R.sup.3.

Abstract: Auramine salts having an ester of sulfopropionic acid as anion. The salts are more stable in storage than known auramine salts and therefore very suitable for the preparation of storage-stable solutions.