Semi-volatiles surrogate with indicator

n-Propyl 4-hydroxybenzoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 94-13-3

4-n-Nonylphenol, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 104-40-5

N-Nitroso-N-methyl-N-dodecylamine, 10mg