EPA Method 525 - PCB Standard

4-methylphenanthrene, 25mg

2,3-Dimethyl-2-butanethiol, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 1639-01-6

2,2-Bis(bromomethyl)-1,3-propanediol, 100 µg/ml,