EPA Method 8021B Internal Standard

2,2',4,4',6,6'-Hexachlorobiphenyl, 100 µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 33979-03-2

ISOPAR H

2,3',4,4',5,5'-Hexachlorobiphenyl, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 52663-72-6