EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11916.13-K-ME Dembrexine hydrochloride monohydrate,1000 µg base/mL,MeOH,1mL, Price on request 674994 Mepiquat chloride, 100mg Price on request 1147.27-K-IO n-Heptacosane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 593-49-7 Price on request