EPA 1620 Standard 2

n-Perfluorododecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 307-55-1

Triazophos, 100µg/ml in Cyclohexane, 5ml

2,3',4-Trichlorobiphenyl ,100 µg/mL,isooctane,1mL,