beta-HCH, 10.0 µg/ml, Ethyl acetate, 10ml

N-Methyl(nitrosoamino)-ethanol,1000 µg/mL,acetonitrile,1mL,

Ammonium (NH4+)

2,2-Bis(bromomethyl)-1,3-propanediol, 100 µg/ml,