You can source most standard water-treatment chemicals from India. These include coagulants, flocculants, scale and corrosion inhibitors, biocides, membrane cleaners and boiler treatment products.
Gujarat has many producers because the same plants serve the state's own chemical, textile and power industries, which treat large volumes of water.
Main product groups
- Coagulants such as poly aluminium chloride (PAC), aluminium sulphate (alum) and ferric chloride gather fine particles together.
- Flocculants, usually polyacrylamide polyelectrolytes in anionic, cationic or non-ionic forms, bind those particles into larger flocs that settle or filter.
- Scale inhibitors, often phosphonates such as HEDP and ATMP or polymer dispersants, stop deposits in cooling towers, boilers and membranes.
- Corrosion inhibitors protect pipework and heat exchangers in closed and open systems.
- Biocides control bacteria and algae in cooling water.
- Membrane chemicals include antiscalants and cleaning products for reverse osmosis plants.
What to specify
For PAC, agree the alumina content, basicity and form, whether liquid or powder. For alum and ferric chloride, agree the active content and limits on iron or insoluble matter. For polyelectrolytes, agree charge type, charge density and molecular weight range, with a jar test on your own water.
Phosphonates are usually sold by active acid content. Ask for the test method so that your laboratory can repeat it.
Handling and transport
Several water-treatment chemicals are corrosive. Ferric chloride and some liquid PAC grades are acidic, and many biocides are toxic or harmful to aquatic life. These may ship as dangerous goods, in UN-approved drums or IBCs, with the right labels and declaration.
Powder polyelectrolytes absorb moisture and can cake in humid containers. Ask for lined bags and check the bags for damage at loading. Liquid products need a stable temperature range, so ask the supplier for storage limits.
Freight cost and lead time depend heavily on the hazard class. Check the safety data sheet with your forwarder before you compare quotes.
Finally, ask how long each product keeps its strength. Some liquid coagulants and biocide blends lose activity over months, so order quantities that you will use within the stated shelf life.
Drinking water and biocides
Chemicals used for drinking water often need certification to a national standard, such as NSF/ANSI/CAN 60 in North America or the relevant EN standards in Europe. Biocides are regulated as active substances in many markets, including under the EU Biocidal Products Regulation.
These rules put duties on the importer or the person placing the product on the market. Check them with your regulator before you buy, and ask the supplier which approvals they already hold. If you sell into the EU, read about EU REACH for imported chemicals as well.
Next step
We find water-treatment chemical makers, have samples tested on your water, and supervise packing and loading. Book a free sourcing review.