Sulfate (SO4-2), 1000µg/ml in Water, 100ml Back Catalog number: 54106 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended E3041-100ML FE3041 Potassium for IC 1g/L ,100LPF Price on request E4039-500ML FE4039Lanthanum for AAS 1g/L ,500LPF Price on request E4023-500ML FE4023 Copper for AAS 1g/L ,500LPF Price on request