Isoproturon, 10µg/mL in Acetonitrile, 10ml

3-Hydroxybenzo[a]pyrene, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 13345-21-6

Fluorescein disodium salt dihydrate, 90%,neat,neat,1g,

EPA Method 521 Nitrosamines