Bayer Aktiengesellschaft

Walter Scholl

Horst Nickel

Winfried Mennicke

Karl-Heinz Schundehutte

Chromium complex dyestuffs of the formula ##STR1## wherein X denotes hydrogen or nitro,

Chromium complex azo dyestuffs and mixtures of chromium complex azo

Reactive dyestuffs of the formula ##STR1## wherein D, R, R.sub.1, R.sub.2, n, p, R.sub.3, R.sub.4 and m have the meaning indicated in the description, and their use for dyeing and printing various materials, above all materials containing hydroxyl groups, such as cotton, linen, cellulose or regenerated cellulose.

Reactive dyestuffs

1:1 and 1:2 metal complex reactive dyestuffs based on at least one metallizable dyestuff of the formula ##STR1## wherein D=the radical of a metallizable diazo component with an OH group or COOH group in the o-position relative to the azo bridge,

Metal complex reactive dyestuffs

Unsymmetrical chromium mixed complex dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 denote C.sub.1 -C.sub.4 -alkyl, nitrile, carbonamide or X-Z, X denotes a direct bond or a bridge member to a C atom of the rings A, B, C or D or to a 3-C atom of the pyrazoles and Z denotes SO.sub.3 H, COOH or OSO.sub.3 H and A, B, C and D can possess further substituents, are suitable for the dyeing and printing of nitrogen-containing fibrous materials in yellow shades.

Growing community of inventors

Cologne, Germany

Walter Scholl