What exactly is TCCA 90% granular, and why does it keep showing up in search queries from pool operators and water treatment buyers across Russia? TCCA is a chlorinated disinfectant granule containing roughly 90% available chlorine, used to sanitize swimming pools and treat industrial water supplies. Its full chemical name, trichloroisocyanuric acid, describes a cyclic compound built around a triazine ring carrying three chlorine atoms.

What is TCCA 90% granular and how is it made?

TCCA 90% granular is produced by chlorinating cyanuric acid under controlled conditions, yielding a dense white granule that slowly releases hypochlorous acid once dissolved in water. In practical terms, it works like a slow-release chlorine reservoir — similar to how a time-release tablet delivers medicine gradually rather than all at once.

Chemical composition and available chlorine content

The available chlorine content is the single most important spec buyers check first. TCCA 90% typically delivers 88–90% available chlorine by weight, which is noticeably higher than most sodium dichloroisocyanurate (SDIC) grades sitting around 56–60%, and higher than standard calcium hypochlorite at 65–70%. Real-world testing on batches imported into Russian ports consistently shows readings within this 88–90% band when stored correctly.

TCCA compared with SDIC and calcium hypochlorite

TCCA is often confused with other chlorine granules, but the three main compounds behave differently in water. SDIC dissolves almost instantly, making it suitable for shock dosing, while calcium hypochlorite adds calcium hardness over time and raises pH more aggressively. TCCA dissolves slower and carries built-in cyanuric acid, which stabilizes chlorine against UV degradation outdoors.

Compound	Available chlorine	Dissolution rate	pH effect
TCCA 90% granular	88–90%	Slow	Mildly acidic
Sodium dichloroisocyanurate	56–60%	Fast	Near neutral
Calcium hypochlorite	65–70%	Moderate	Raises pH/hardness

Technical specifications of TCCA 90% granular

The core specification sheet for TCCA 90% granular covers available chlorine, granule size, bulk density, moisture content, and solubility — and a mismatch in any of these points usually signals a diluted or poorly stored batch.

Granule size, bulk density and solubility

Standard industrial granules measure roughly 0.3–0.8 mm, with bulk density near 850–900 kg/m³. Buyers of chlorine granules for large-scale water purification tablets production often request tighter particle-size bands to control dissolution speed on automated dosers.

pH value and stability in water

A 1% TCCA solution typically measures pH 2.7–3.3, meaning it is mildly acidic — this matters because dosing large amounts without buffering can slowly push pool pH downward. Does that make TCCA unsuitable for sensitive water chemistry? Not necessarily; most operators simply pair it with a pH-raising agent during routine balancing.

Russian market compliance and certification requirements

TCCA sold for swimming pool disinfectant or industrial water treatment chemicals use in Russia must pass through госрегистрация as a disinfecting agent and comply with relevant ГОСТ and ТР ТС technical regulations covering oxidizing chemical products.

ГОСТ and ТР ТС technical regulations

Importers typically need documentation confirming compliance with the applicable ТР ТС technical regulation for chemical products and packaging labeling rules, alongside product safety data sheets referencing the compound's classification as an oxidizer. According to industry practice, suppliers who cannot produce this paperwork on request are usually not worth the risk.

СанПиН water quality and residual chlorine standards

СанПиН sanitary norms for pool and drinking water set acceptable residual chlorine ranges that pool operators must monitor with test kits, not guesswork. TCCA is regulated as a disinfection chemical, so dosing has to stay within residual chlorine limits set by local sanitary authorities rather than maximizing dose for convenience. When in doubt, consulting a certified water treatment specialist is advisable rather than relying solely on supplier recommendations.

Industry consensus among water treatment chemists is that stabilized chlorine compounds like TCCA reduce chlorine loss from UV exposure by a significant margin compared with unstabilized sodium hypochlorite, though exact figures vary by climate and pool exposure.

How much TCCA do you need per cubic meter of pool water?

For a typical outdoor pool, TCCA 90% granular dosing runs roughly 20–30 grams per m³ for initial shock treatment and 2–5 grams per m³ per day for maintenance, adjusted according to bather load and temperature.

Shock dosing and daily maintenance dosing table

Real-world operators running small residential pools in the Moscow region report settling into a routine after the first two weeks of testing — a pattern that matches the figures below.

Pool volume (m³)	Shock dose (g)	Daily maintenance (g)
10	200–300	20–50
25	500–750	50–125
50	1000–1500	100–250
100	2000–3000	200–500

1. Test current free chlorine and pH before adding any TCCA granules.
2. Pre-dissolve the granules in a bucket of water rather than dumping directly into the pool.
3. Pour the dissolved solution slowly along the pool perimeter with circulation running.
4. Wait at least four hours before retesting chlorine and cyanuric acid levels.
5. Record the dose used to fine-tune the next maintenance cycle.

Cyanuric acid build-up and water replacement cycle

Because every dose of TCCA adds cyanuric acid alongside chlorine, levels accumulate over a season. Many pool operators follow a practical rule of partial water replacement once cyanuric acid approaches 100–150 ppm, since beyond that range chlorine's disinfecting power starts to weaken noticeably — a phenomenon often called chlorine lock.

Storage, transport and handling guide for TCCA granules

TCCA 90% granular is classified under UN2468 as a Class 5.1 oxidizer, Packing Group II, which dictates specific transport, labeling, and storage conditions within Russia and during cross-border shipment.

UN2468 Class 5.1 oxidizer transport rules

Shipments require oxidizer hazard labeling, segregation from flammable materials and reducing agents during transport, and sealed packaging rated for the product. Warehouses storing chlorine powder export inventory typically keep TCCA away from organic materials, metals, and any ammonia-based products — mixing these is a genuine fire and toxic-gas risk, not a theoretical one.

Preventing caking during Russian winters

Cold, humid storage conditions common across much of Russia in winter months encourage granule caking if drums aren't sealed tightly. Keeping storage temperature below roughly 30°C, avoiding direct sunlight, and preventing condensation inside opened containers noticeably extends shelf life — typically two to three years when stored correctly, according to manufacturer handling notes referenced in the tcca compound data records.

TCCA pricing and supplier verification in Russia

Indicative ruble pricing for TCCA 90% granular generally falls within a range tied to global chlorine feedstock costs, ocean freight, and import clearance fees — figures here are approximate market ranges, not fixed quotes.

Typical ruble price range and customs costs

As a rough reference, bulk TCCA 90% granular has traded in a range comparable to other chlorine granules and pool sanitizer tablets categories, with per-kilogram pricing typically landing somewhere between 120–220 рублей depending on order volume, packaging format, and delivery terms, before adding customs duties and VAT applicable to imported disinfection chemicals supplier shipments. Actual pricing should always be confirmed directly with a disinfection chemicals supplier rather than relied upon from indicative figures.

How to check authenticity: iodometric test and solubility check

Counterfeit or diluted batches are a real concern in the chlorine granules trade. A simple iodometric titration test, run by a basic lab, confirms whether available chlorine content matches the claimed 90% figure. On the practical side, a quick solubility check — dissolving a measured gram in warm water and observing clarity and residue — can flag obviously substandard material before it reaches the pool.

Safety precautions and equipment compatibility

TCCA granules are safe when handled correctly, but a handful of common mistakes cause most reported incidents — mixing with incompatible substances tops that list.

Why mixing TCCA with ammonia or urea is dangerous

Accidentally combining TCCA with ammonia-containing cleaners or urea-based fertilizers can generate nitrogen trichloride, a toxic and potentially explosive gas. This is one of the most frequently searched safety questions around chlorine powder handling, and for good reason — the reaction can occur quickly and with little warning. Damp granules left in a sealed, poorly ventilated container have also been linked to self-heating incidents, so moisture control isn't optional.

Compatibility with дозатор, skimmer and filter systems

TCCA granules work well with floating dispensers, inline dosers (дозатор), skimmer baskets, and standard sand or cartridge filters common in residential Russian pool setups. That said, direct contact between undissolved granules and vinyl liners or metal fittings can cause localized bleaching or corrosion — pre-dissolving before dosing avoids this almost entirely. According to tcca chemistry overview references, this localized effect is a function of concentrated contact time rather than the compound itself being unusually aggressive.

TCCA 90% granular remains one of the most practical chlorine granules options for Russian pool operators and water treatment buyers who need stabilized, long-lasting disinfection. Getting the specifications, dosage per m³, compliance paperwork, and storage conditions right from the start avoids most of the common complaints tied to this compound — and that groundwork matters far more than chasing the lowest price per kilogram.