EPA Method 551.1 Performance Check Sol’n Back Catalog number: 30115 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3281.19-K-IO Methyl 9-trans-12-hydroxyoctadecenoate , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 7706-01-6 Price on request C17800800 Tricresylphosphate, certified, 0.25g Price on request 676512 DPOSA, 10mg Price on request