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 E4300-100ML FE4300Matrix Mod Cesium 2% ,100LPF Price on request E3026-100ML FE3026Maleate for IC 1g/L ,100LFL Price on request E1305-100ML FE1305 Barium ICP 100mg/L ,100LPF Price on request