Complaint
| Item | Standard |
| NAOH | 99%MIN |
| NA2CO3 | 0.7% MAX |
| NaCL | 0.03% MAX |
| Fe | 0.005% MAX |
Sodium hydroxide (NaOH) is one of the most useful industrial sodium compounds. It is also known as lye or caustic soda and is one of the strongest base alkalis (high pH value) on the household market. It is used as a drain and oven cleaner, and it saponifies fats in the manufacture of soap. It must be used with care because it is also capable of producing serious skin burns.
