Arsenic (As) Back Catalog number: 57233 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72286 Verapamil Price on request 1957.6-K-IO 1,4-Dichlorobenzene-d4, 1000µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 3855-82-1 Price on request 30181 EPA Method 505 Analyte Mix Price on request