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克魯勃SYNTHESO PRO AA 2 K 克魯勃SYNTHESO PRO AA 2 K 克魯勃SYNTHESO PRO AA 2 K The substances subject to registration are the so-called "phase-in" chemicals, most of them old substances that were already on the European market before 1981 and are listed in the EINECS chemical register. New substances and substances already listed in ELINCS have already been transferred to the REACH system and do not have to be registered again.