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First Standard® 伏马毒素 B2
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2,3-二溴-5-氟三氟甲苯 | 1027511-90-5 | 乐研
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First Standard® 2,2,5,5-四氯联苯
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First Standard® 2,2,4,5,5-五氯联苯
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2,4-二硝基甲苯标准溶液,121-14-2,analytical standard,1000ug/ml in methanol
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2,4-二硝基甲苯标准溶液,121-14-2,analytical standard,1.00mg/ml in methanol
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对溴甲苯,106-38-7,99%
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First Standard® 4-氯-5-(4-甲苯基)-1H-咪唑-2-腈
4-Chloro-5-(4-tolyl)-1H-imidazole-2-carbonitrileFirst Standard®天津
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