EPA Method 507 Nitrogen Phosphorus Pesticides

Salicylic acid-d4 (3,4,5,6-d4), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-10, Cas.no. 7864-17-0

Captan-3,3,4,5,6,6-d6,100 µg/mL,acetonitrile,1mL,

2-n-Hexylthiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 18794-77-9