2,3,4,6-Tetrachlorophenol, 100 µg/ml, Methanol,

Mass-Labelled HCH Solution/Mixture, 2µg/ml in Nonane, 1,2ml

1-(4-Isopropylphenyl)-3-methylurea, 100mg

C27 Ring-C Monoaromatic sterane (5ß(H),10ß(CH3)/5?(H),10ß(CH3)),10 µg/mL,isooctane,1mL,