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 E1040-100ML FE1040 Nickel ICP 1g/L ,100LPF Price on request E4058-100ML FE4058 Platinum for AAS 1g/L ,100LFL Price on request E4108-100ML FE4108 Calcium AAS conc 10g/L ,100LPF Price on request