RANKEM® Sodium Sulphate Anhydrous AR Grade (≥99.0%) is a high-quality analytical reagent conforming to AR (Analytical Reagent) specifications. Sodium sulphate (Na₂SO₄, anhydrous) is widely used as a drying agent for organic solvents (particularly in solvent extraction workflows), in gravimetric analysis, in preparation of standard solutions, and as a reagent in organic synthesis. AR grade ensures very low levels of heavy metal impurities, chloride, and other interfering ions. Key specifications: minimum purity ≥99.0% (by titration), maximum chloride <0.0005%, maximum heavy metals <5 ppm, white free-flowing powder. CAS No: 7757-82-6. Supplied with certificate of analysis. Available in 500 g and 1 kg pack sizes.