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 E1409-100ML FE1409 Praseodymium ICP 10mg/L ,100LPF Price on request E4606-50ML FE4606Matrix Mod Amm-P 100g/L ,050LPF Price on request E1199-100ML FE1199 Zirconium ICP 10g/L ,100LPF Price on request