Abstract: Disazo dyestuffs which in the form of the free acid correspond to the formulaD--N.dbd.N--M--N.dbd.N--A--ORwhereinM represents a 1,4-phenylene or 1,4-naphthylene residue which is optionally substituted by halogen, alkyl, alkoxy or acylamino groups,A represents a phenyl residue which is optionally substituted by halogen or alkyl groups and which contains a sulphonic acid group which is bonded directly or via a bridge member,R represents hydrogen or an alkyl group with 1-7 C atoms andD represents a benzene nucleus which is optionally substituted by halogen, alkyl or carbonamide groups.The dyestuffs are particularly suitable for the dyeing and printing of natural and synthetic fibre materials containing amide groups.

Abstract: Disazo dyestuffs which in the form of the free acid correspond to the formula ##SPC1## pivotalWherein Q represents a hydroxyl group, an alkoxy group or an acylamino group, A is a radical of the benzene or naphthalene series which is optionally further substituted, R represents hydrogen or an alkyl radical, X denotes --O-- or --NH-- and the benzene nucleus K can further be substituted by non-ionic radicals and the benzene nucleus M can further be substituted by halogen, alkyl or alkoxy groups.The new dyestuffs are particularly suitable for dyeing and printing natural and synthetic fiber materials containing amide groups. The resulting dyeings are distinguished by good wet fastness properties and good light fastness properties.