EPA 1620 Standard 2 Back Catalog number: 52140 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8744.18-100-T 2,5-Dichloro-o-terphenyl, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request 3402.12-100-AN Fenson Price on request 71244 Methyl paraoxon, 1000µg/ml in MeOH, 1ml Price on request