EPA Method 8250/8250A Cal Check BNS Back Catalog number: 82507 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8618. 9-K-ME 4-Chloromethyl-2-phenyl-1,3-dioxa-2-borolane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. Price on request 83550 Hexanaldehyde-DNPH Price on request 676232 Pyrazophos, 100 µg/ml, Methanol, 1ml Price on request