D3-Ipronidazole, 100 µg/ml, Methanol, 1ml

EPA Method 524 & 624 - Internal Standard

24-Ethylcholest-5-en-3ß-ol, 100µg/mL, Solvent-n-hexane, Unit 1mL, # of units-1, Cas.no. 83-46-5

2,2’,4,4’-Tetrachlorobiphenyl