Guanyl Urea-15N4 Hydrochloride, 1mg

2,4'-DDE, 100 µg/ml, Acetonitrile, 5ml

Acetaminophene-d4 (Paracetamol-d4), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 64315-36-2

EPA Method 8260 Internal & Surrogate Standard