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METHYLUMBELLIFERYL ACETATE, 4-(RG) 标准品
Naphthalene and Monosubstituted Naphthalene Kit
双氰胺(供检查用)
First Standard® 醚菊酯
盐酸克伦特罗 BePure-21375XM
N.N-Dimethylbenzamide Solution 1300ug/ml in Acetonitrile
Cadmium Nitrate (Cd(NO3)2) 99.999%(有证书)
甲醇中西马特罗(塞曼特罗)
倍硫磷溶液,1000ppm
2,3,3',4,4',5',6-Heptachlorobiphenyl (无证书)