Sodium Dichloroisocyanurate (SDIC), also known by its chemical name NaDCC (Sodium Dichloroisocyanurate Anhydrous), is a highly effective disinfectant widely used in swimming pools and drinking water treatment. Its powerful chlorine-releasing ability makes it ideal for killing bacteria and viruses, ensuring clean, safe, and healthy water.
In this article, we’ll explore how SDIC/NaDCC works, its benefits, and how to use it properly in various water disinfection applications.
What is SDIC (NaDCC)?
SDIC, or NaDCC, is a stable, white crystalline compound that releases chlorine when dissolved in water. It comes in tablets, powder, and granules, making it easy to use in both commercial and residential water treatment systems. Its available chlorine is typically 60% (in anhydrous form – NaDCC), and has three forms: powder, tablets (1g to 200g), and slow-release blocks.
Why Use SDIC (NaDCC) in Swimming Pools?
Using NaDCC in swimming pools ensures:
✅ Effective disinfection against bacteria, algae, and viruses
✅ Stabilized chlorine levels that are less affected by sunlight (compared to liquid chlorine)
✅ Easy handling and storage, especially in tablet or granular form
✅ Long shelf life and stable performance
Application Tip:
For routine pool chlorination, NaDCC tablets can be placed in skimmer baskets, floating dispensers, or automatic feeders. They dissolve slowly, maintaining a consistent chlorine level over time.
Is NaDCC Safe for Drinking Water?
Yes. NaDCC is approved by the WHO and widely used in emergency water disinfection, military field kits, household purification, and rural water supply systems. Source: WHO Guidelines for Drinking-water Quality, NCBI
Its advantages include:
✅ Kills 99.9% of waterborne pathogens
✅ No strong chlorine smell or taste
✅ Easy-to-measure dosage (especially with tablets)
✅ Compact and portable – ideal for field use
Dosage Guide:
1 NaDCC tablet (e.g., 67mg) is enough to treat 1 liter of clear water.
Always follow instructions on dosage and contact time (typically 30 minutes).
SDIC vs NaDCC: What’s the Difference?
Actually, NaDCC is the anhydrous form of SDIC. While people often refer to the product as SDIC, professional-grade water treatment products usually use the anhydrous version (NaDCC) for:
- Higher chlorine content (~60%)
- Better storage stability
- Ideal for tablet and block production
So when you see “SDIC tablets” or “SDIC powder,” they’re typically made from NaDCC.
Safety Tips When Using NaDCC
- Store in a cool, dry place
- Avoid contact with moisture until ready to use
- Do not mix with other chemicals (e.g., acids or ammonia)
- Use clean tools when measuring or dispensing
Contact Us Now For More Detailed Information About Our Nadcc
Sodium Dichloroisocyanurate (SDIC) is a powerful and reliable chlorine-based disinfectant with wide applications in water treatment, sanitation, and industrial cleaning. Its high stability, strong disinfection ability, and ease of use make it a preferred choice for professionals worldwide
At Linp Chemical, we specialize in the production and export of premium-quality SDIC with flexible packaging and prompt global delivery. If you are looking for a trusted supplier for your water treatment or sanitation needs, feel free to contact us for samples, pricing, or technical support. We’re here to help.
