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First Standard® 甲醇中2,4-滴-2-乙基己基酯溶液, 1000μg/mL
2,4-D 2-ethylhexyl ester Solution in Methanol, 1000μg/mLFirst Standard®天津
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First Standard® 2甲4氯钠盐
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First Standard® 2,2,4,5,5-五氯联苯
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丁酸异戊酯,106-27-4,Standard for GC,≥99.5%(GC)
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First Standard® 磺胺甲噻二唑-D4
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First Standard® 2,2,3,4,4,5,5-七氯联苯
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First Standard® 4,4’-滴滴滴
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First Standard® 4,4’-滴滴伊
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First Standard® 2,4"-甲氧滴滴涕
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First Standard® 2,4,6-三氯苯甲醚
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