Product Description L-Cystine Other Details Molecular Formula: C6H12N2O4S2 Molecular Weight: 240.3 CAS Number: 56-89-3 Minimum Purity: 0.99 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 25g Leadtime:20 Days Sizes 2: 100g Leadtime:20 Days Sizes 3: 250g Leadtime:20 Days