EPA Method 524 & 624 - Internal Standard Back Catalog number: 19494 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3154.7-K-IO Methyl hexanoate (Methyl caproate), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 106-70-7 Price on request 51172 Retention Time Verification Standard Price on request 4TBPDPP 4-tert-Butylphenyl diphenyl phosphate, 1.2ml x 50ug/ml, toluene Price on request