Sodium azide is an inorganic azide salt supplied at min. 98 % purity for synthesis applications. Identified by CAS number 26628-22-8 and EG nr. 247-852-1, it has the empirical formula NaN₃, a molar mass of 65,01 g/mol and a density of 1,846 g/cm³. This reagent is Physical constants and identity data support straightforward integration into established protocols and documentation. The material is available from manufacturer Carl ROTH as a synthesis-grade chemical for research and production environments. Handle according to applicable laboratory safety practice for azide compounds; the associated UN number 1687 reflects its transport classification. Clear labelling of CAS, formula and purity helps purchasing and quality teams specify the correct grade for synthetic routes and related chemical processes. This article is part of Inorganic salts, in Inorganic chemicals. Key features Assay (cerim.): ≥98 % Water insoluble residue: ≤0,1 % Iron (Fe): ≤0,001 % pH value (1 % in H2O): ~10 CAS number: 26628-22-8 Pack sizes: 100 g, 500 g, 1 kg EG nr.: 247-852-1 Purity: min. 98 % Molar mass: 65,01 g/mol Technical Information Sheet: Safety Data Sheet: