Trichlor Tablets — TCCA 90% Stabilized Chlorine for Outdoor Pools

Trichlor tablets are high-strength stabilized chlorine tablets made from trichloroisocyanuric acid (TCCA), delivering a minimum of 90% available chlorine — the highest concentration of any solid pool sanitizer. What sets trichlor tablets apart from unstabilized chlorines is their built-in cyanuric acid stabilizer, which shields chlorine from rapid photodegradation by ultraviolet sunlight. This makes them the sanitizer of choice for outdoor pools in sunny climates, where unstabilized chlorine can lose more than half its residual in a single afternoon. Everglory Industrial manufactures and exports premium-grade trichlor tablets in 3-inch (200g) slow-dissolving and 1-inch (20g) rapid-dissolving sizes, supplying distributors, pool service companies, and water treatment contractors in more than 60 countries.

What Are Trichlor Tablets?

Trichlor tablets are compressed solid disinfectant blocks composed of trichloroisocyanuric acid, an organic chlorine compound with the chemical formula C3Cl3N3O3 and CAS number 87-90-1. Each molecule of TCCA carries three active chlorine atoms bound to a cyanuric acid backbone. When a tablet dissolves in water, hypochlorous acid — the primary sanitizing agent — is released, while the cyanuric acid ring remains in solution as a UV stabilizer. This dual action is the defining feature of trichlor tablets: sanitization and stabilization delivered in a single pre-measured dose.

The stabilization mechanism works through a reversible equilibrium. Cyanuric acid binds to free chlorine, forming a mild chlorinated isocyanurate complex that absorbs UV radiation in the wavelength range that would otherwise destroy hypochlorous acid. When the pool consumes chlorine through oxidation of contaminants, the equilibrium releases replacement chlorine from the stabilized reserve. In practical terms, cyanuric acid extends chlorine persistence in outdoor water from roughly two to three hours to several days, dramatically reducing the daily chlorine demand of sun-exposed pools. Typical cyanuric acid yield from trichlor tablets is 55-58% by weight.

Trichlor is an acidic sanitizer with a saturated solution pH of 2.6-3.0. Each dose therefore tends to lower total alkalinity and pH slightly, which pool operators must balance with periodic alkalinity adjustment. This acidic character also makes trichlor self-limiting in scale formation — unlike calcium hypochlorite, it deposits no calcium residue and does not increase water hardness.

Trichlor Tablets vs Calcium Hypochlorite Tablets

Trichlor and calcium hypochlorite are the two most widely traded solid pool sanitizers, yet they differ fundamentally in chemistry and performance. The comparison below helps B2B buyers match the right product to the right application:

Trichlor Tablet Specifications

Everglory Industrial manufactures trichlor tablets to a strict technical specification, with every production batch verified in our ISO 9001 laboratory before release:

Applications of Trichlor Tablets

• Outdoor residential pools: Homeowners in sunny regions dose trichlor tablets through skimmers or floating dispensers for week-long chlorine protection — the core retail segment in markets across the Middle East, Latin America, and Southeast Asia
• Commercial outdoor pools: Municipal and private swim clubs operating sun-exposed pools rely on trichlor erosion feeder systems to hold residuals through peak UV hours without daily redosing
• Hotel and resort pools: Hospitality operators in tropical and Mediterranean destinations standardize on trichlor tablets for their combination of high chlorine strength, UV stability, and low maintenance labor — critical where pools operate year-round
• Decorative water features: Fountains, reflection pools, and ornamental ponds with sun exposure use small-format trichlor tablets to control algae and odor without dosing equipment
• Aquaculture pond treatment: Fish and shrimp hatcheries apply measured trichlor doses for water disinfection between production cycles, benefiting from the calcium-free chemistry that avoids hardening soft pond water

Advantages of Stabilized Chlorine

• UV protection reduces chlorine waste: The built-in cyanuric acid in trichlor tablets can cut UV-driven chlorine losses by up to 80%, preserving sanitizer that unstabilized products lose to photolysis every sunny day
• Lower dosage frequency: With 90% available chlorine and solar shielding, a single 200g trichlor tablet maintains residuals for up to a week — fewer doses per season than any unstabilized tablet
• Longer intervals between treatments: Pool service contractors can schedule weekly or biweekly visits instead of daily checks, reducing route costs and increasing the number of accounts each technician can serve
• Ideal for sunny climates: In high-UV regions where unstabilized chlorine fails within hours, stabilized trichlor tablets remain the only practical tablet option for continuous outdoor sanitization
• Cost-effective for outdoor use: Higher active chlorine content plus UV stabilization means lower total product consumption per season, delivering a lower cost-per-treated-liter than unstabilized alternatives in outdoor applications

Packaging and Storage

As a UN 2468 Class 5.1 oxidizer, trichlor tablets are packed exclusively in UN-certified plastic drums with inner PE liners, fully compliant with IMDG code requirements for ocean freight. Standard export drum sizes:

Store trichlor tablets in the original sealed drum in a cool, dry, well-ventilated area away from direct sunlight, heat, acids, and organic materials. Trichlor is chemically incompatible with calcium hypochlorite — never store the two products in the same area, never mix them in the same feeder or dispenser, and never allow residues of one product to contact the other, as the combination can react violently. Keep drums sealed tightly after opening; shelf life is 24 months from production under proper storage conditions.

Frequently Asked Questions