Aluminum Chlorohydrate is an inorganic compound with high active content and high basicity. In addition to its use as a coagulant in water treatment, it is also applied in sludge dewatering and as an antiperspirant agent. Aluminum Chlorohydrate [CAS: 12359-72-7], with the empirical formula Al₂(OH)₅Cl·2H₂O, has an r ratio (OH/Al) of 2.5 as a derivative of Polyaluminum Chloride.
According to U.S. FDA standards, Aluminum Chlorohydrate should contain 23–24% Al₂O₃, have a density of 1.33–1.35 g/cm³, and contain low levels of impurities such as iron (max. 50 ppm), sulfate (max. 0.025%), metal ions (Ca, Mg, Na max. 10 ppm), and heavy metals (such as lead, max. 10 ppm).
A characteristic feature of Aluminum Chlorohydrate is the predominance of Al₁₃ polymers (≈88%) in equilibrium with monomers and smaller polycations. The highly charged Al₁₃⁷⁺ species, surrounded by counter Cl⁻ ions, create repulsive forces that stabilize the product, thereby preventing the precipitation of aluminum hydroxide. As a result, Aluminum Chlorohydrate can be stored for many years under proper storage conditions without forming sediments or undergoing structural degradation.
- Possesses strong floc-forming properties.
- Provides rapid floc formation.
- Reacts easily at low raw water temperatures.
- Can be dosed directly without solution preparation.
- Generates less chemical sludge compared to other inorganic coagulants.
- Provides high COD removal.
- Ensures high heavy metal removal.
- Delivers high turbidity removal.
- Leaves no residual aluminum (Al³⁺) in treated water.
- Requires lower dosages compared to other coagulants.
- Used in sludge dewatering applications.
- Used as an antiperspirant agent in deodorants.
Aluminum Chloride Hydroxide (ACH)
| Product Form: | Liquid |
| Appearance: | Clear Liquid |
| Active Substance: | 23±1% Al2O3 |
| Relative Basicity: | 80±5% |
| Density: | 1.350 g/cm³ |
| pH (5% Solution): | 3.5 - 5.5 |
| Viscosity: | < 50 cps |
