Sulfate (SO4-2) Back Catalog number: 50410 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2257.12-50-IO 3'-Fluoro-3,4-dibromodiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request 92027 Anthracene-d10 Price on request 30004 EPA Method 500 Series Internal Standard #5 Price on request