Sodium hydroxide (Caustic Soda)
Sodium hydroxide is used for the production of soap, rayon, paper, explosives, dyes, and petroleum products. It is also used in cotton fabric processing, washing and bleaching, cleaning and metal processing, oxide coating, electroplating and electrolytic extraction. It is usually found in commercial drains and cleaners.
Our Sodium hydroxide Specification
| Test Name | Unit | Degree Importance | Accepting Limit | Test Method |
|---|---|---|---|---|
| Purity of Sodium Hydroxide (NaOH) | %W | Important | 98‡1 | ISIRI-364 CLAUSE 1-7 / IRISI 6135 |
| Carbonate as Na2CO3 | %W | Important | Max 1 | ISIRI-364 CLAUSE 2-7 / IRISI 6135 |
| Chloride as NaCl | %W | Important | Max 0.06 | ISIRI-364 CLAUSE 3-7 / IRISI 2535 |
| Sulfate as Na2SO4 | %W | Important | Max 0.01 | ISIRI-364 CLAUSE 4-7 / IRISI 2539 |
| Silicate as SiO2 | %W | Important | Max 0.02 | ISIRI-364 CLAUSE 5-7 / IRISI 2531 |
| Fe | Mg/Kg | Important | Max 30 | ISIRI-364 CLAUSE 6-7 / IRISI 2537 |
| Insoluble in Water | %W | Important | Max 0.1 | ISIRI-364 CLAUSE 7-7 / IRISI 7904 |
| Aluminium as Al203 | Mg/Kg | Important | Max 20 | ISIRI-364 CLAUSE 8-7 / IRISI 7903 |
| Heavy Metals as Pb | Mg/Kg | Important | Max 20 | ISIRI-364 CLAUSE 9-7 / IRISI 7905 |
Sodium hydroxide (Caustic Soda)
Caustic soda is a well-known strong base which is used in many industries. About 56% of the production of sodium hydroxide is used in industries, 25% of it is used in food industry. The main use of sodium hydroxide is in sodium salts and detergents, as a pH regulator and synthesis of organic substances. NaOH is also used in Bayer's process for aluminum production.
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