H.S.Code 28151100 CAS No. 1310-73-2 UN No. 1823 (Corrosive) Dangerous Class 8.2 Molecular formula NaOH Molecular wt 40.01 Production standard GB209/93 Index Spec- 99% NaOH content % ≥ 99.0 Na 2 CO 3 % ≤ 1.0 NaCl % ≤ 0.08 Fe 2 O 3 % ≤ 0.01 Appearance White Flakes