Polyaluminium Chloride

Effective, High Basicity

Polyaluminium Chloride (PAC)


Polyaluminium chloride (PAC) is a inorganic polymer flocculant. 

PAC has been developed for water treatment applications. Totally soluble in water it has a formula:



Polyaluminium chloride is also used for several applications including the treatment of drinking water, swimming pool water,  the treatment of sewage and industrial effluents. It is also used extensively in the pulp and paper processing industry and in production of deorderant and antipresprant. .


PAC’s high basicity make it superior compare to other inorganic coagulants. It is a highly efficient coagulant with low generation of waste sludge in a wide pH range, even at low temperature.


Pride-Chem can provide polyaluminium chloride in the following UN packaging: 

200L PP Drum

Suitable for small quantity spot dosing.

200L PP Drum

Suitable for small quantity spot dosing.



PAC could be considered as one of the best alternative chemical to alum for coagulation which has both the advantage of lesser optimum dosage and less sludge generation which contribute leads to cost savings.


An important property of PAC is their basicity. This is the ratio of hydroxyl to aluminum ions in the hydrated complex and in general the higher the basicity, the lower will be the consumption of alkalinity in the treatment process and hence impact on pH. 



The PAC coagulants in general consume considerably less alkalinity than alum. They are effective over a broader pH range compared to alum and experience shows that PAC works satisfactorily over a pH range of 5.0 to 8.0. PAC produces less sludge than alum counterpart.


Other Advantages

PAC has shorter flocculation time than aluminium sulphate. There is no requirement for neutralizing agent (soda ash, lime), because of the high basicity of PACs. 

Chemical name Polyaluminium chloride
COMMON NAME Aluminium chlorohydrate
Chemical formula ALN(OH)mCI(3n-m)
AI2O3 Content 10-23 %
Density 1.15-1.35 g/cm3
Basisity 35-83%