EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C11668540 Clarithromycin, certified, 0.1g Price on request 10847.22-10MG Chlortetracycline hydrochloride Price on request 9936.15-100-IO Hexylcinnamic aldehyde (purified), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 101-86-0 Price on request