Polyaluminium Chloride is classified as corrosive at higher concentrations, it is typically yellow in colour. It is miscible with water at all concentrations although dilute solutions hydrolyse to precipitate Aluminium Hydroxide (Al(OH)3).
Polyaluminium Chloride is not a single product, but a spectrum of polymers which are characterised by their strength (usually in % Al2O3) and basicity – the latter gives an indication of the polymeric composition of PAC.
| Alumina (Al2O3) Content % | Greater than or equal to 30 | 30.15 | |
| 70-90 | 83.9 | ||
| Less than or equal to 1.5 | 0.3 | ||
| PH Value (1% Solution) | 3.5-5.0 | 3.8 | |
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