Product Description Indigo carmine Other Details Molecular Formula: C16H8N2Na2O8S2 Molecular Weight: 466.35 CAS Number: 860-22-0 Minimum Purity: >98% (HPLC) UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 25mg Leadtime:20 Days Sizes 2: 100mg Leadtime:20 Days Sizes 3: 1g Leadtime:20 Days