Description: 534 organic compounds -- part of the class 532-570 series / 534 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 1) (573) azo (617) fiber- or substrate-reactive azo compound (630) halogen attached directly to a hetero ring or to an alicyclic ring by nonionic bonding (632) the hetero ring is six-membered and contains at least two nitrogens (638) the hetero ring and benzene ring, to which an azo group is bonded directly, bonded directly to the same nitrogen
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