PCB No. 18, certified, 25mg

EPA Method 8260 - Purgeable Internal Standard

2,2-Bis[3,5-dibromo-4-(2,3-dibromopropoxy)phenyl]propane, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 21850-44-2

d4 C28 alpha alpha alpha (20R)/C29 alpha alpha alpha (20R)-Methyl/Ethylcholestane, 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.