Chemicals for water & effluent treatment
Sodium hypochlorite is the workhorse disinfectant for potable and process water in India: it is liquid, it doses easily, and unlike chlorine gas it needs no special handling licence or containment room.
Alongside it, sodium silicate does a quieter job that is often overlooked. Dosed into a distribution system it lays down a thin protective film on pipe walls, reducing corrosion and the red-water complaints that come with it. It also sequesters low levels of iron and manganese, keeping them in solution rather than staining fixtures.
What we supply for this
Technical guidance
Hypochlorite strength and decay
Available chlorine falls with time, heat and light. At Indian ambient temperatures expect measurable loss over a few weeks, and faster above 30°C. Store below 30°C in opaque containers, rotate stock first-in-first-out, and order to consumption rather than stockpiling. If your turnover is slow, a 10% product often delivers more usable chlorine over its life than a 14% bought at the same time.
Silicate as corrosion inhibitor
Dosed continuously at low levels into treated water, silicate forms a protective film on metal pipe. It is most useful in older distribution networks and where red water is a recurring complaint. It also holds modest levels of iron and manganese in solution.
pH correction
Chlorination efficiency is pH-dependent, and many effluent streams need correction before discharge. Caustic soda lye is the usual choice where dosing is continuous; flakes suit smaller or batch operations.
Never mix with acid
Hypochlorite in contact with acid liberates chlorine gas. Keep hypochlorite and acid stores, dosing lines and delivery points strictly separate, and label them clearly.
Common questions
What strength sodium hypochlorite is used for water treatment?
Industrial supply is typically 10 to 14 percent available chlorine. Lower strengths around 4 to 6 percent are more stable in storage and are used where stock turns over slowly.
How long does sodium hypochlorite last in storage?
Available chlorine decays with time, heat and light, with measurable loss over a few weeks at Indian ambient temperatures and faster above 30 degrees Celsius. Store below 30 C in opaque containers and use stock first-in-first-out.
Why add sodium silicate to drinking water systems?
Sodium silicate forms a protective film on pipe walls that reduces corrosion, and it sequesters low levels of iron and manganese so they stay in solution instead of staining fixtures.