Verification II Standard 1 Back Catalog number: 53019 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2518.7-500MG Theophylline, neat, Solvent-neat, Unit 500mg, # of units-1, Cas.no. 58-55-9 Price on request 81414 Malathion, 1000µg/ml in Hexane 1ml Price on request 80151 EPA Method 8015A - Analytes Price on request