Trichloroisocyanuric acid（TCCA） is a kind of chloroisocyanuric acid compounds, and it is an important bleach, chlorinator and disinfectant. But how to choose high quality TCCA? 

1. Purity: Ensure that the product you're purchasing is of high purity. Industrial-grade chlorine typically has a purity level of 90% or higher. Impurities can adversely affect the effectiveness of the chlorine and the safety of its application.

2. Supplier Reliability: Purchase chlorine from reputable suppliers with a history of providing high-quality chemicals. Look for suppliers that adhere to safety standards and have a track record of delivering products on time.

3. Intended Application: Clearly define the purpose of using chlorine in your project. Chlorine has various applications, such as water treatment, disinfection, chemical synthesis, and more. Knowing your specific requirements will help you choose the right type of chlorine.