Sodium hydroxide; caustic soda 
CAS: 1310-73-2 
HS code: 28151100 
UN No. 1823 

Molecular formula: NaOH 
Molecular weight: 40 
Purity: 96% Purity: 98% Purity: 99% 
1) Sodium carbonate: 1.4% 1) Sodium carbonate: 1.1% 1) Sodium carbonate: 0.9% 
2) sodium chloride: 2.8% maximum. 2) sodium chloride: 0.6% maximum. 2) Salt: 0.15% maximum. 
3) Fe: 0.01% maximum. 3) Fe: 0.01% maximum. 3) Fe: 0.01% maximum. 
Specifications: 
Liquid: 32% -50% 
Tablets: 96%, 98%, 99% 
Tablets: 99%