EPA Method 632 Spike Standard Back Catalog number: 93970 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79571 2-(2-Butoxyethoxy)ethanol Price on request 679150 13C, 15N2-Semicarbazide hydrochloride, 10mg Price on request 684986 3,3'-Dichlorobenzidine, 10.0 µg/ml, Acetonitrile, Price on request