Sulfate (SO4-2) Back Catalog number: 50404 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2055.20-100-HX Diphenyl isophthalate, 100µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 744-45-6 Price on request 90438 2,3,5,6-Tetrachlorophenol Price on request 72571 Triethyl citrate Price on request