EPA Method 525 Spike B Back Catalog number: 92313 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70819 Propham Price on request 8021.16-100-ME Heliotrine, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 303-33-3 Price on request 673545 Dichlorvos, 10.0 µg/ml, Ethyl acetate, 10ml Price on request