Product Overview
Sodium dichloroisocyanurate (SDIC, also written NaDCC or Na-DCC) is an organic chlorine compound used extensively as a disinfectant and bleaching agent. Great Spring supplies SDIC in both anhydrous form (available chlorine ≥ 60%) and dihydrate form (available chlorine ≥ 56%), commonly marketed as “SDIC 65%” and “SDIC 56%” respectively. SDIC granules and powder dissolve rapidly in water, releasing hypochlorous acid (HOCl) as the active disinfecting species, effective against a broad spectrum of bacteria, viruses, spores, and algae.
Compared with TCCA, SDIC has a higher water solubility and a slightly higher pH in solution (~5.5 – 7.0), making it gentler on pool fittings and more suitable for applications requiring quick, complete dissolution.
Key Technical Specifications
- Chemical Formula: C₃Cl₂N₃NaO₃ (anhydrous) / C₃Cl₂N₃NaO₃·2H₂O (dihydrate)
- Available Chlorine (anhydrous): ≥ 60.0%
- Available Chlorine (dihydrate): ≥ 56.0%
- Moisture (anhydrous grade): ≤ 2.0%
- pH (1% solution, 25 °C): 5.5 – 7.0
- Appearance: White granules or white powder, mild chlorine odour
- Particle Size (granular): 8 – 30 mesh (customisable)
- Solubility (25 °C): ~250 g / L (highly soluble)
- CAS No.: 2893-78-9 (anhydrous); 51580-86-0 (dihydrate)
Main Applications
- Swimming Pool & Spa Treatment: Fast-dissolving shock treatment; effective for maintaining residual chlorine 1 – 3 ppm
- Drinking Water Disinfection: WHO-approved for emergency and routine potable water treatment in tablets and granular form
- Hospital & Institutional Sanitation: Surface disinfection of wards, operating theatres, and medical equipment; widely used during epidemic response
- Food Industry: Sanitising food-contact surfaces, processing equipment, and fruit/vegetable washing water
- Agriculture & Livestock: Animal house disinfection, irrigation water treatment, and plant disease control
- Textile & Paper: Bleaching agent in fabric finishing and pulp processing
Packaging
Granular: 25 kg or 50 kg plastic-lined woven bags; 25 kg plastic buckets. Powder: 25 kg kraft paper bags with inner PE liner. Retail tablet packs (1 g, 3.3 g, 200 g) available for private-label distributors. Store in a cool, dry, well-ventilated area, away from acids and organic materials. Shelf life: 2 years in sealed packaging.
Why Source SDIC from Great Spring?
- Factory-direct supply from a dedicated SDIC production base; no third-party agent margins
- Stable available chlorine ≥ 60% (anhydrous) verified per GB/T 20369 and SGS third-party lab
- One-stop water-treatment chemical sourcing: SDIC, TCCA, cyanuric acid, and calcium hypochlorite
- Hazmat export expertise: UN 2465 classification, IMDG packaging, certificate of analysis, and MSDS for all markets
- References from distributors in Europe, the Middle East, West Africa, and Southeast Asia available upon request
