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4,4‘-DDT标准品
A0405072 燕麦镰孢 CAS号75-21-8
丙酮中丁醚脲
Benzo[a]pentacene (in vial for quick-preparation of solution)
2,3,3',4,4',5,6-Heptachlorobiphenyl Solution 100ug/ml in Hexane (无证书)
水中钠成分分析标准物质
ASTM D3606 Benzene in Gasoline Std. #3 w/ IS in Isooctane
CNET metaacrolein methacrolein solution, 10μg/ml (as methacrolein) in acetonitorile
First Standard® 磺胺苯吡唑
GPC标样-聚丙烯(Mw 890)(低Mw) 标准品