Polyaluminum Chloride (PAC)
CAS Number: 1327-41-9
Polyaluminum chloride (PAC) is a high-basicity inorganic coagulant with 30% Al2O3 content, widely used in drinking water and wastewater treatment. It forms large, dense flocs rapidly over a broad pH range and outperforms traditional alum in turbidity removal efficiency. Available as liquid or spray-dried powder.
Technical Specifications
| basicity | 75–95% |
| appearance | Light yellow to yellow liquid or powder |
| Al2O3 content | ≥30% (powder); 10–12% (liquid) |
| density liquid | 1.18–1.22 g/cm³ |
| insoluble matter | ≤0.2% |
| pH 1pct solution | 3.5–5.0 |
Applications
- Municipal drinking water treatment and turbidity removal
- Industrial wastewater clarification
- Paper industry retention and drainage
- Swimming pool and recreational water treatment
- Food processing water clarification
Key Features
- 30% Al2O3 content delivers superior coagulation at lower doses
- Effective over pH 5.0–9.0 without significant pH adjustment
- Rapid floc formation reduces settling time and tank size
- Lower sludge volume compared to aluminum sulfate
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