Sodium Dichloroisocyanurate (SDIC) is a highly effective, broad-spectrum organic chlorine disinfectant with the molecular formula C₃Cl₂N₃NaO₃ (CAS: 2893-78-9) . It is a white, crystalline powder or granular solid with a faint chlorine odor, containing 56–60% available chlorine. As a chlorinated isocyanurate derivative, SDIC is valued for its high stability, rapid solubility, and powerful biocidal activity, making it a preferred alternative to traditional disinfectants like sodium hypochlorite (liquid bleach) and calcium hypochlorite (bleaching powder).
Sodium Dichloroisocyanurate is one of water treatment chemicals and desinfectants.
Used as biocide in swimming pool, industrial cycling water, etc.
The standard chloro content is 56% & 60%. SDIC has three forms: powder, granular, and tablet.
Sodium Dichloroisocyanurate are also called Dichloro, DCCNA, SDIC.
Application:
1. Water treatment: Swimming-pool, drinking water, industrial circulating-cooling water.
2. Sterilization: Disinfecting in hospital, family, hotel, public place, pharmaceuticals, breeding industry.
3. Bleach: Organic synthetic industry, textile industry.
4. Others: in doing shrink-proofing agents in wool finishing and paper mothproofing agent etc.
Advantages：
- Broad-spectrum efficacy: Kills nearly all common pathogens, including resistant strains.
- High stability: Long shelf life in solid form; minimal chlorine loss during storage.
- Fast-acting: Dissolves quickly and works rapidly against microbes.
- Low toxicity: Safer than many other chlorine disinfectants when used as directed.
- Cost-effective: Lower dosage required compared to bleach, reducing long-term costs.
Safety & Handling：
SDIC is a strong oxidizer and irritant. Direct contact may cause skin/eye irritation; inhalation of dust can irritate the respiratory tract . It must be stored in a cool, dry, well-ventilated area, away from combustibles, reducing agents, acids, and ammonia (to avoid toxic chlorine gas or explosive nitrogen trichloride) . When preparing solutions, add SDIC to water (not vice versa) and wear protective gear (gloves, goggles, mask).
Conclusion：
Sodium Dichloroisocyanurate (SDIC) is a versatile, reliable, and cost-effective disinfectant that plays a critical role in modern sanitation and water treatment. Its unique combination of stability, solubility, and broad-spectrum activity makes it indispensable across residential, commercial, industrial, and agricultural sectors. When handled properly, SDIC provides safe, powerful protection against harmful pathogens, supporting public health and hygiene worldwide.
Tianjin XXX Industrial Products Co., Ltd. is a professional exporter of high-quality pool and water treatment chemicals. With over 20 years of R&D and production experience, our factory, located in Tianjin, China, specializes in manufacturing Calcium Hypochlorite, SDIC, and TCCA, serving international markets with reliable and top-quality products...[ read more ]
