The present invention relates to diaminotriazine compounds of the formula (I) and to their use as herbicides. The present invention also relates to agrochemical compositions for crop protection and to a method for controlling unwanted vegetation.whereinAis 5- or 6-membered monocyclic heteroaryl, which comprises 1, 2 or 3 heteroatoms as ring members, which are selected from O, S and N, where heteroaryl is substituted by 1, 2, 3, 4, or 4 substituents RA,R1, R2are inter alia H, OH, S(O)2NH2, CN, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, (C3-C6-cycloalkyl)-C1-C4-alkyl, C1-C6-alkoxy, (C1-C6-alkoxy)-C1-C6-alkyl, (C1-C6-alkyl)-carbonyl, (C1-C6-alkoxy)carbonyl, (C1-C6-alkyl)sulfonyl, (C1-C6-alkylamino)carbonyl, di(C1-C6-alkyl)aminocarbonyl, (C1-C6-alkylamino)sulfonyl, di(C1-C6-alkyl)aminosulfonyl and (C1-C6-alkoxy)sulfonyl, etc.Xis phenyl which is unsubstituted or may carry, 1, 2, 3, 4 or 5 radicals RArincluding their agriculturally acceptable salts.