Anthraquinone derivatives of the formula ##STR1## or of the tautomeric formula ##STR2## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and is optionally further substituted and which preferably consists of at most 5 fused rings,m denotes an integer, preferably 1 or 2, andR.sub.1 denotes a hydroxyl group or a radical of the formula ##STR3## wherein R.sub.2 represents a substituent andn represents 0, 1, 2, 3 or 4,processes for their preparation, their use for pigmenting organic macromolecular substances and the material pigmented in this manner.