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一缩二丙二醇
4,4‘-BIS(DIMETHYLAMINO)BENZOPHENONE 标准品
52种农残混标
己烷雌酚
S-Ethyl Ester N,N-Diethyl-carbamothioic Acid,
头孢曲松钠3.5水合物 MU-7872-50mg
2.3'.4.6-Tetrachlorobiphenyl Solution 100ug/ml in Hexane (无证书)
3-Ethylthiophene
Di(2-thienyl)disulfide
3'.4'-Dichloropropionanilide