EPA Method 507 Surrogate Standard Back Catalog number: 19049 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA1329000AL Ethofumesate, 100µg/mL in Acetonitrile, 1ml Price on request 3242.22-K-IO 13-cis,16-cis-Docosadienoic acid , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 17735-98-7 Price on request 72238 n-Heptane-d16 Price on request