Fast sulphon black F by Research Lab Fine Chem Industries is a high grade reagent. This compound is a complexometric indicator. The reagent is available as a powder which is soluble in water. While it is stable under general conditions, this reagent is incompatible with strong oxidizing agents. CAS No.: 2353-45-9 Quantity Provided: 25 gm per bottle Molecular formula: C30H20N4O11S3 Molecular weight: 708.69Fast sulphon black F has a variety of applications in chemical and biological sectors. This reagent finds applications in the organic synthesis of various derivatives. As a complexometric indicator, fast sulphon black F is used in combination with EDTA for copper complexation determination. It is purple when complexed with copper, and then turns green when titrated against EDTA. This reagent is suitable for the industrial synthesis of products and research applications.