EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679081 Pyrethrins, 10.0 µg/ml, Cyclohexane, 10ml Price on request 96561 Nortriptyline Price on request 1929.12-50-IO 4'-Fluoro-2,3,3',4,5,6-hexabromodiphenyl ether Price on request