Ammonia solution , ROTIPURAN® Supra 20 %, Molar mass (M) 17,03 + aq g/mol, Density (D) 0,92 to 0,94 g/cm³, CAS No. [1336-21-6], UN-Nr. 2672, EG-Nr. 215-647-6, Empirical formula NH3 + H2O