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5,6-Difluoro-2,2',3,4,4'-pentabromodiphenyl ether (2,2',3,4,4'-Pentabromo-5,6-difluorodiphenyl ether
First Standard® 丙酮中3种杀虫剂混标溶液,100ug/ml(定制)
Codeinone
2-Methylheneicosane
2,4-Dinitrophenylhydrazine 标准品
仲丁灵 Bepure-GBW(E)082584
芴
铬花氰R (Mordant blue 3) (无证书)
4-吡哆酸-d3
广灭灵/异恶草酮/异恶草松 标准品