Coagulants are used for treatment of all kinds of water
Coagulation is the oldest known water treatment method
In industry, coagulants are frequently used for water treatment
In drinking water production, coagulants remove particles, humic substances and colour
Coagulants produce healthy and enjoyable drinking water
Coagulants are used for treatment of all kinds of water

Inorganic coagulants are obliged to comply with the European regulation on the Classification, Labelling and Packaging (CLP) of substances and mixtures (EC 1272/2008) which is enforced in parallel with REACH.

The CLP regulations established a self-classification system. The maker of a substance or mixture must create a safety data sheet and appropriate warning label which is attached to the product’s packaging. Once a substance is classified as hazardous, each actor in the supply chain is required to communicate the identified hazards to the next actor in the chain. Changes in the classification of a substance imply that all downstream safety data sheets and labels must be updated.

CLP also imposes new labelling which is in accordance with the Globally Harmonised System of Classification and Labelling of Chemicals (GHS). GHS introduces new pictograms, signal words and statements.

While CLP came into force on 20 January 2009, it has not totally replaced existing directives covering classification, labelling and packaging of chemicals and substances. Existing directives 67/548/EEC (substances) and 1999/45/EC (preparations) will not be completely repealed until 1 June 2015.

During this transitional period, INCOPA is closely monitoring developments and keeping members informed. Frequent updates to the classification of substances are expected during the REACH and CLP transitional phases.

Applications

Drinking Water
In order to protect our health, all drinking water must be cleared of pathogens and impurities before it is used.
Industrial Uses
For industry, coagulants provide a method of reusing water in a cost-effective way that does not comprise the industrial process.
Waste Water
To ensure the water does no harm to people or the environment when it is released, waste water must be treated to reduce the level of contaminants to acceptable levels.
Other Applications
In addition to their role as inorganic coagulants, aluminium and iron salts are used in many other applications.
Paper Industry
Inorganic coagulants are used in two critical parts of the paper production process: sizing and retention.

FAQs

What happens to the sludge produced by inorganic coagulants?

When inorganic coagulants react with the impurities in the water, sludge is produced. The coagulant is removed from the water with the sludge. Good quality sludge, which has no trace of toxins, can be used in agricultural applications as fertiliser. Depending on its composition, sludge can also be used as biomass to produce biogas, incinerated, or placed in landfill.

 

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