CAS 1327-41-9 · Advanced Coagulant · NSF/ANSI 60 Available
Poly Aluminum Chloride
PAC · Polymeric Aluminum Coagulant · CAS 1327-41-9
The next-generation coagulant for water treatment — PAC's pre-polymerized aluminum species deliver higher charge density, lower residual aluminum, and broader pH effectiveness than conventional alum. Increasingly specified for drinking water plants, industrial wastewater, and paper manufacturing. Texas-Chem supplies PAC in 10% and 17% solution grades.
Type
Polymeric Al
pH (1%)
3.5–5.0
Effective pH
5.0–9.0
Pack Sizes
Drums · Totes · Bulk
PAC vs. Alum
| Property | PAC | Alum |
|---|---|---|
| Effective pH range | 5.0–9.0 | 5.5–8.0 |
| Residual Al | Lower | Higher |
| Dose required | Lower | Higher |
| Sludge volume | Less | More |
| Cold water perf. | Better | Reduced |
| Cost per dose | Higher | Lower |
Safety & Regulatory
- NFPA Health
- 1 — Slight hazard
- NFPA Flammability
- 0 — Non-flammable
- NFPA Reactivity
- 0 — Stable
- DOT Classification
- Not regulated (solution)
- NSF/ANSI 60
- Certified grades available for potable water
- Incompatibilities
- Strong bases, strong oxidizers
- Skin/Eye
- Mildly irritating — use standard PPE
- Disposal
- Neutralize before disposal per local regulations
Grades & Packaging
Available Grades
Pack Sizes
Physical & Chemical Properties
| Chemical Formula | [Al₂(OH)ₙCl₆₋ₙ]ₘ (polymeric) |
| CAS Number | 1327-41-9 |
| Physical Form | Clear to pale yellow liquid or white powder |
| Aluminum Content | 10–17% Al₂O₃ equivalent |
| Basicity | 40–85% (OH/Al ratio) |
| pH (1% solution) | 3.5–5.0 |
| Density | 1.19–1.35 g/cm³ (solution) |
| Flash Point | Non-flammable |
| Effective pH Range | 5.0–9.0 (broader than alum) |
| Charge Density | Higher than alum — more effective at lower doses |
| Residual Aluminum | Lower than alum at equivalent turbidity removal |
| Odor | Slight acidic odor |
Industrial Applications
Drinking Water Treatment
Increasingly preferred over alum for drinking water clarification — PAC produces lower residual aluminum in treated water, performs better at low temperatures, and is effective over a wider pH range. NSF/ANSI 60 certified grades available.
Wastewater Treatment
Coagulant for municipal and industrial wastewater — PAC removes suspended solids, turbidity, color, and phosphorus at lower doses than alum. Particularly effective for treating colored wastewater from textile and pulp industries.
Paper Manufacturing
Retention and drainage aid in paper production — PAC improves filler and fiber retention, enhances drainage, and reduces chemical oxygen demand (COD) in paper mill effluents. Compatible with both acidic and neutral papermaking conditions.
Sludge Dewatering
Conditioning agent for municipal biosolids — PAC improves sludge dewaterability and reduces polymer demand. Higher basicity PAC grades produce less sludge volume than alum at equivalent treatment performance.
Industrial Process Water
Clarification of process water in food and beverage, mining, and chemical manufacturing. PAC is effective for removing colloidal silica, clay, and organic matter from process water streams.
Stormwater Treatment
Coagulant for stormwater treatment systems — PAC rapidly destabilizes fine particles and colloids in stormwater runoff, enabling effective removal in compact treatment systems with short hydraulic retention times.
Why Source PAC from Texas-Chem?
- 35+ years supplying coagulants to Texas water utilities and industrial customers
- NSF/ANSI 60 certified grades for potable water treatment
- 10% and 17% solution grades; dry powder available
- Drums, totes, and bulk tanker delivery
- Technical support for coagulant selection and jar testing
- Same-day quotes for standard quantities