Sodium Hydroxide (Caustic Soda) pH Adjuster
CAS Number: 1310-73-2
Sodium hydroxide is the primary alkaline pH adjustment chemical used in water and wastewater treatment to raise pH, neutralize acidic effluents, precipitate heavy metals, and maintain optimal conditions for coagulation and flocculation. It is supplied as solid flakes/pearls or as 50% aqueous solution for direct dosing. Proper pH control is essential for effective coagulation, scale inhibition, and compliance with discharge pH limits.
Technical Specifications
| Fe | ≤10 ppm |
| NaCl | ≤0.05% (membrane grade) |
| purity | ≥99% (solid) / 49–51% (solution) |
| density | 1.52–1.53 g/cm³ (50% solution) |
| appearance | White flakes, pearls, or clear solution |
Applications
- Wastewater pH neutralization
- Heavy metal precipitation pH adjustment
- Boiler water alkalinity control
- RO system pH adjustment
- Coagulation and flocculation pH optimization
Key Features
- Standard and membrane-grade (low NaCl) available
- Liquid grade for easy metering pump dosing
- Widely approved for potable water pH adjustment
- Effective for heavy metal hydroxide precipitation
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CAS Number
1310-73-2
Category
Water Treatment ChemicalsAvailability
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