EPA Method 500 Series Internal Standard

alpha-HCH, 10 µg/ml, Ethyl acetate, 10ml

1-Heptanethiol, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 1639-09-4

2,7-Dimethylnaphthalene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 582-16-1