This MegaMix standard contains 28 components, 2000 µg/ml each in P and T methanol, 1 ml/ampule.

Components: Benzene, bromodichloromethane, bromoform, carbon disulphide, carbon tetrachloride, chlorobenzene, chloroform, dibromochloromethane, 1,1-dichloroethane, 1,2-dichloroethane, 1,1-dichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene, 1,2-dichloropropane, cis-1,3-dichloropropene, trans-1,3-dichloropropene, ethylbenzene, methylene chloride, styrene, 1,1,2,2-tetrachloroethane, tetrachloroethene, toluene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, trichloroethene, m-xylene, o-xylene, p-xylene.

In methanol solution, ketones can interact with other compounds, resulting in a methoxy addition to the ketone.¹ The presence of halogenated compounds greatly speeds the reaction, limiting shelf-life to less than two months