Heptachlor-exo-epoxide (cis-, isomer B), certified, 10mg

2-Bromophenol, 1.2ml x 100ug/ml, toluene

3-Chlorothiophene in isooctane Units: 5x1mL ampoules

n-Alkanes C10-C40 (even + pristane/phytane) 18 Analytes, each 100µg/ml in cyclohexane; units: 1x1mL, 5x1mL, 10x1mL This standard includes all the even n-paraffins + pristane and phytane. n-Decane C10 n-Dodecane C12 n-Tetradecane C14 n-Hexadecane C16