Sodium sulfate. anhydrous for analysis EMSURE® ACS,ISO,Reag. Ph Eur. Sodium sulfate MSDS (material safety data sheet) or SDS, CoA and CoQ, dossiers, brochures and other available documents. CAS #: EC Number: 231-820-9 Molar Mass: 142.04 g/mol Chemical Formula: Na₂SO₄ Hill Formula: Na₂O₄S Grade: ACS,ISO,Reag.Web