EPA Method 507 Pesticide Standard Back Catalog number: 91974 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678226 4-n-Octylphenol, 250mg Price on request 0171.18-500-IO 1-Phenyldibenzofuran, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 63317-69-13 Price on request IBPO004 Ponceau 4R (E 124), 1g Price on request