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 Na2CO3 % ≤1.0 NaCl % ≤ 0.08 Fe2O3 % ≤0.01 Appearance: White Flakes