EPA Method 515.1 Surrogate Standard Back Catalog number: 30022 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79326 tert-Butyl hydroquinone (TBHQ) Price on request 675112 Fenpyrazamine, 100mg Price on request 8592.6-100-IP 2,4,6-Tribromo-3,5-difluorophenol, 100µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. NA Price on request