Aluminum Sulfate Coagulant (Alum)
CAS Number: 10043-01-3
Aluminum sulfate (alum) is the most widely used coagulant for potable water treatment and municipal wastewater processing. It hydrolyzes in water to produce aluminum hydroxide flocs that capture suspended particles, colloids, and natural organic matter. Available in liquid and granular grades meeting ANSI/NSF Standard 60.
Technical Specifications
| Fe content | ≤0.005% (potable grade) |
| appearance | White to cream granules or colorless liquid |
| heavy metals | Meets NSF/ANSI 60 |
| pH 1pct solution | 3.0–4.5 |
| Al2O3 content solid | 15.8–17.0% |
| Al2O3 content liquid | 8.0–8.5% |
Applications
- Potable water treatment as primary coagulant
- Municipal wastewater clarification
- Swimming pool and spa water treatment
- Paper and pulp sizing and retention
- Soil remediation and phosphorus immobilization
Key Features
- NSF/ANSI 60 certified for use in potable water treatment
- Proven coagulant with decades of operational data
- Effective NOM and turbidity removal at optimal pH 6.5–7.5
- Granular form offers easy handling and safe storage
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