Product Description Naphthol AS-BI potassium sulfate Other Details Molecular Formula: C18H13BrKNO6S Molecular Weight: 490.37 CAS Number: 1680-70-2 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 250mg Leadtime:65 Days Sizes 2: 500mg Leadtime:65 Days Sizes 3: 1g Leadtime:65 Days