EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3721.6-K-IP 2,3-Dibromophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 57383-80-9 Price on request 1579.4-10MG Metformin hydrochloride Price on request 57205 Boron (B) Price on request