EPA Method 525 Standard Back Catalog number: 94574 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675028 Sodium 4-n-octylbenzenesulfonate, 10mg Price on request S-4502-75-25IO Phosphorous Standards Phosphorus in Isooctane Tri-n-butylphosphate, 99+% (Chiron product nr. 1399.19) CAS [126-73-8] Matrix: Isooctane , 20cSt Units: 1x25mL, 1x100mL Isooctane Price on request 1995.10-50-IO 1,4-Dichloronaphthalene, 50µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 1825-31-6 Price on request