EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1839.9-1G 4-Ethylbenzoic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 619-64-7 Price on request 51137 NWTPH-HCID- Retention Time Mix Price on request 8635.18-25-AN U{13C18}-Zearalenone, 25µg/mL, Solvent-acetonitrile, Unit 1.2mL, # of units-1, Cas.no. Price on request