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乙腈中苄嘧磺隆
2,2',3,4,4',5',6-Heptachlorobiphenyl
DL-N-Benzoylalanine (无证书)
硅铁成分分析标准物质
GBW(E)090962 仲丁灵 CAS号43056-63-9
Carbon Dioxide in Nitrogen (Nominal 2.0 % mol/mol)
纽甜溶液,100ppm
1,4-Phenylene diisothiocyanate (无证书)
First Standard® 乙嘧酚
倍硫磷砜-oxon溶液,100ppm