Trichloroisocyanuric acid

Trichloroisocyanuric acid (CAS 87-90-1), commonly known as TCCA, is a chlorine-based oxidizing agent and biocide.

Where is Trichloroisocyanuric acid used?

• Water treatment: active compound in swimming pool and potable water disinfection tablets, slow-dissolving to maintain residual chlorine
• Textile and paper processing: bleaching agent that whitens fibers and pulp without liquid chlorine handling risks
• Food processing: TCCA-based solutions sanitise equipment and surfaces where chlorine-releasing disinfectants are approved
• Personal care manufacturing: preservative and antimicrobial active in industrial cleaning formulations
• It delivers controlled, sustained chlorine release for disinfection or bleaching.
• Used as a reagent in organic synthesis.

Formulation notes

• For drinking water disinfection, used at about 0.4 grams per 100 kilograms of water.
• Reacts with strong acids to produce toxic chlorine gas.

Typical specification

• Has about 90% available chlorine.
• Moisture content is no more than 0.5%.
• Sold in powder, granule, tablet, or chip form.
• CAS number 87-90-1 and HS number 29336922.

Regulatory status

• Classified under UN number 2468 for transport.
• UN transport classification: Class 5.1, Packing Group II.
• Classified as H272: may intensify fire; oxidiser.
• The EU harmonised classification and labelling index number is 613-031-00-5.

Storage, packaging and handling

• Reacts explosively with calcium hypochlorite.
• Reacts violently with ammonia, ammonium salts, amines and sodium carbonate, creating a fire and explosion hazard.
• Becomes sticky or agglomerating when exposed to humid air.

Frequently asked questions about Trichloroisocyanuric acid

What granule sizes are available for trichloroisocyanuric acid?

Granule is available in 8-30 mesh and 20-60 mesh sizes, or as decided by the customer.

What is the pH of a 1% aqueous solution?

A 1% aqueous solution has a pH between 2 and 3.2.

How is trichloroisocyanuric acid classified under EU regulations?

It is classified by the European Union as an oxidizing, harmful, irritant substance and dangerous for the environment.

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