Product Description Naphthol AS-PH Other Details Molecular Formula: C19H17NO3 Molecular Weight: 307.35 CAS Number: 92-74-0 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