EPA Method 507 - Performance Check Solution

2,2',4,6,6'-Pentachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 56558-16-8

Bis(2-ethylhexyl) Isophthalate, >98%, 25g

N-Ethyl-N-phenylurethane, 50mg