EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675139 Carfentrazone-ethyl, 10.0 µg/ml, Acetonitrile, 1 Price on request 3905.16-1G Tartrazine (E102), neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 1934-21-0 Price on request 71621 1-Heptene Price on request