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精高效氯氟氰菊酯 BePure-21539XA
EPA VOC Mix 1, 200 mg/L, (RM, ISO GUIDE 34)
4-叔辛基苯酚的二乙氧基脂,100 μg/mL in Methanol
o-Tolualdehyde (DNPH Derivative) Solution 100ug/ml in Acetonitrile
1,2,6,8-Tetrachlorodibenzo-p-dioxin 标准品
Polycizer?DP 500 标准品
Propamocarb HCl Solution 100ug/ml in Toluene
Tin (Metallo-Organic)
Tin Shot (Sn)
4-溴苯胺 标准品