Sulfate (SO4-2), 1000µg/ml in Water, 500ml Back Catalog number: 54506 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended E4022-500ML FE4022 Copper for AAS 1g/L ,500LPF Price on request E1123-100ML FE1123 Tellurium ICP 1g/L ,100LPF Price on request E1378-100ML FE1378 Cerium ICP 10mg/L ,100LPF Price on request