Both Sodium Dichloroisocyanurate (SDIC) and Trichloroisocyanuric Acid (TCCA) belong to the chlorinated isocyanurate family — yet they serve fundamentally different market needs. As a B2B buyer or distributor, selecting the right product can directly affect your customer satisfaction, repeat orders, and profit margins.
Quick-Reference Comparison Table
| Attribute | SDIC | TCCA |
|---|---|---|
| Available Chlorine | 56% / 60% | 90% |
| Solubility (25°C) | 25 g / 100 ml (high) | 1.2 g / 100 ml (low) |
| Dissolution Speed | Very fast (seconds) | Slow release (hours / days) |
| pH of 1% Solution | 6.0 – 7.0 (neutral) | 2.7 – 3.3 (acidic) |
| Best Use Case | Quick shock disinfection | Continuous slow dosing |
| Typical Forms | Powder, granular, effervescent tablets | 200g tablets, granular |
| Storage Hazard Class | UN 3077 (Class 9) | UN 2468 (Class 5.1) |
When Should You Choose SDIC?
- Your customers need instant, broad-spectrum disinfection — e.g. hospital surfaces, food contact equipment, emergency water treatment
- Skin contact or sensitive surfaces are involved (the neutral pH is safer)
- Distribution to regions with strict Class 9 transport regulations
- The buyer prefers effervescent tablets for consumer convenience
When Should You Choose TCCA?
- Long-duration, unattended chlorination is required (pools, cooling towers, water tanks)
- The customer needs higher chlorine concentration per kilogram (better freight economics)
- The application benefits from UV-stable chlorine (outdoor pools, open-air water systems)
- Tablet-dispenser systems or floating chlorinators are already deployed
Pro Tip: Sell Both, Capture More Market
Many of our most successful distributor partners stock both SDIC and TCCA in complementary formats. This allows them to capture the full spectrum of buyers — from residential pool owners to large industrial accounts. Shilan Chemical offers attractive volume pricing on combined orders, plus full OEM/private-label support to help you build a branded product line.
Need help selecting the right product mix for your target market? Our export team has helped distributors in 50+ countries — let’s discuss your strategy.