In the realm of water treatment and sanitation chemicals, Trichloroisocyanuric Acid (TCCA) and Sodium Dichloroisocyanurate (SDIC) are two of the most prominent and effective disinfectants. Both are stable, chlorine-releasing compounds that offer broad-spectrum antimicrobial activity, but they possess distinct properties and advantages that make them suitable for different applications. For businesses seeking to purchase these chemicals, understanding these differences is crucial for making an informed decision. As a leading chemical supplier based in China, we offer both TCCA and SDIC, and this guide aims to help our B2B clients choose the right product for their specific needs.

Trichloroisocyanuric Acid (TCCA) 90%
TCCA, with its high effective chlorine content (around 90%), is known for its potent oxidizing and chlorinating power. It typically has a lower pH in solution compared to SDIC, which can enhance its disinfecting efficacy in certain conditions. TCCA is often favored for applications requiring a strong and rapid kill of microorganisms, such as in swimming pools where high bather loads can introduce significant contamination. Its stability and slow-release tablet form make it excellent for continuous sanitization.

Key Advantages of TCCA 90%:

  • Higher available chlorine content for more potent disinfection.
  • Lower pH in solution, potentially enhancing efficacy against certain pathogens.
  • Excellent stability and long shelf life, especially in tablet form.
  • Cost-effective for large-volume water treatment needs.

Sodium Dichloroisocyanurate (SDIC)
SDIC, often available in anhydrous or dihydrate forms, typically has an effective chlorine content of around 56% or 60%. While less concentrated than TCCA, SDIC is also a highly effective disinfectant and is particularly valued for its gentler nature and less acidic impact on water chemistry. SDIC releases hypochlorous acid and also contains cyanurate ions, which help stabilize the released chlorine against degradation by UV light, making it particularly useful for outdoor applications like swimming pools. It is also widely used in drinking water treatment and general sanitation due to its broad-spectrum efficacy and good solubility.

Key Advantages of SDIC:

  • Good disinfection efficacy with less impact on water pH compared to TCCA.
  • Contains cyanurate stabilizers, offering UV protection to the chlorine residual.
  • Good solubility and ease of use in various concentrations.
  • Often preferred for drinking water disinfection and sensitive applications.

Choosing Between TCCA and SDIC
The choice between TCCA and SDIC often depends on specific application requirements:

  • For Intensive Disinfection & Pools: If you need strong, rapid disinfection, especially in high-contamination environments like swimming pools with heavy bather loads, TCCA 90% is often the preferred choice due to its higher chlorine content.
  • For Drinking Water & Broader Sanitation: SDIC is frequently chosen for drinking water treatment, general sanitation, and applications where a milder pH impact is desired. Its UV stability also makes it a strong contender for outdoor pools.
  • Cost Considerations: While TCCA is more concentrated, the cost-effectiveness needs to be evaluated based on the required dosage and application. We advise clients to compare pricing and consider the total cost for their specific usage.

Partner with a Trusted Supplier
As a leading chemical supplier in China, we offer both TCCA 90% and SDIC in various forms to meet diverse industrial and commercial needs. Our commitment to quality, competitive pricing, and reliable supply chains ensures that you receive the best products for your disinfection and water treatment requirements. We invite you to contact us to discuss your specific needs, compare products, and secure the most suitable chemical solution for your business. Let us be your trusted partner in chemical procurement.