Sodium dichloroisocyanurate

Sodium dichloroisocyanurate (CAS 2893-78-9), commonly known as NaDCC or troclosene sodium, is a chlorine-releasing compound used as a disinfectant, biocide, and bleaching agent.

Where is Sodium dichloroisocyanurate used?

• Water treatment: disinfection of drinking water, swimming pools, and wastewater streams
• Food processing: surface sanitation and equipment disinfection
• Textile and paper manufacturing: bleaching agent for fibers and pulp
• Personal care: effervescent disinfectant tablets and antiseptic products
• It delivers controlled, stable active chlorine in solid form.
• In the textile industry, used in the shrink-proofing treatment of wool.
• Used to make tablets for drinking water treatment.
• Used for shock chlorination in cases of water problems such as algae growth, green water or cloudy water.
• Used in powdered dishwasher detergents for the food service, healthcare and food industry sectors.

Formulation notes

• Releases a toxic gas on contact with an acid (EUH031).

Typical specification

• Contains isocyanuric acid, which protects the chlorine from UV radiation and prevents chlorine degradation at higher water temperatures and strong sunlight.
• Offered in various sieve cuts, including 8-30 mesh, 20-40 mesh and 18-60 mesh.
• Typically available in purity levels of 56% to 60%.
• The pH of a 1% solution is between 5.5 and 7.0.

Regulatory status

• Classified for transport under UN hazard class 5.1 with packing group II.
• Carries the harmonized index number 613-030-00-X under CLP Annex VI.
• The dihydrate form is not classified as an oxidizer (no H272), unlike the anhydrous form.
• Has UN number 2465.

Storage, packaging and handling

• Reacts violently with hypochlorites, alkaline compounds, acids and water, creating a fire and explosion hazard.
• Should be stored only in its original container, separated from flammable and incompatible materials, in a well-closed, non-combustible, dry place with no access to drains or sewers.

Frequently asked questions about Sodium dichloroisocyanurate

What is the CLP hazard classification of sodium dichloroisocyanurate?

It is classified under CLP as an oxidizer that may intensify fire (H272).

Which forms and CAS numbers are available?

It is available as the anhydrate (CAS 2893-78-9) and the dihydrate (CAS 51580-86-0).

How do the physical forms differ in handling and dissolution?

Granules have a medium dissolution rate and are easier to handle and dose than powder, while tablets have slow, controlled dissolution and provide pre-measured dosage.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.