EPA Method 8275A Mix #2

2-/4-Cyclohexylphenol, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 26570-85-4

2,2',3,3',4',5,5'-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene

Coumarin, 100mg