EPA Method 524.2 - Revision 4.0 Back Catalog number: 33001 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 1048.25-K-IO n-Nonadecylcyclohexane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 22349-03-7 Price on request 3566.18-K-IO 5,12-Naphthacenequinone, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1090-13-7 Price on request 680842 Azobenzene, 100 µg/ml, Cyclohexane, 1ml Price on request