EPA Method 507 Nitrogen Phosphorus Pesticides

n-Hexylcyclohexane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4292-75-5

13C3-Caffeine, 100 µg/ml, Methanol, 1ml

2,4-D 2-ethylhexyl ester, certified, 100mg