EPA Method 507 Surrogate Standard Back Catalog number: 19049 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10675.8-1ML Di(ethylene glycol)butyl ether Price on request 9337.10-100-IO Tetrahydrolinalool, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 78-69-3 Price on request 11634.16-250MG Ampicillin,neat,neat,250mg, Price on request