EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended H808452 4-Hydroxybenzoic Acid-d4, 10mg Price on request SC-237106B Thymolphthalexon, 2g Price on request 1719.15-500-IO 4-Methylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 832-64-4 Price on request