EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70344 4-Chlorophenol Price on request 674489 Permethrin, 10.0 µg/ml, Acetonitrile, 10ml Price on request 8220.7-250MG O-(2,3,4,5,6-Pentafluorobenzyl)hydroxylamine hydrochloride, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 57981-02-9 Price on request