Sandoz Gmbh

Fidelity Union Trust Company, Executive Trustee Under Sandoz Trust

Georg Schoefberger

August Schweizer

Alfred Frei

Helmut A Moser

Anionic disazo compounds of the formula ##STR1## and salts thereof each cation of which is independently a non-chromophoric cation, and mixtures of such compounds or salts, wherein D is wherein

Sulfo group-containing disazo compounds containing substituted

A process for the dyeing of paper with granulated dyeing preparations, preferably dissolved in water. For the process granulated dyeing preparations are used which consist of

Process for producing colored paper using granulated dye compositions

Concentrated, liquid preparations of metal-free direct azo dyes, which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the stock and for dyeing paper sheet.

Concentrated aqueous dye compositions containing a low molecular weight

Disclosed are compounds of the formula, ##STR1## or WHEREIN D is, ##STR2## X is --COOM or --SO.sub.3 M, R.sub.1 and R.sub.2, independently, are hydrogen, halogen, C.sub.1-3 alkyl or C.sub.1-3 alkoxy,

Disazo dyes having a 6-amino or substituted

Concentrated, liquid preparations of metal-free direct azo dyes which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the stock and for dyeing paper sheet.

Disclosed are compounds of the formula ##STR1## in which R, R.sub.1 and R.sub.4, which may be the same or different, each signify a hydrogen atom, an alkyl radical of 1 to 6 carbon atoms or an alkoxy radical of 1 to 6 carbon atoms,

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Georg Schoefberger