Product Description Z-NH-PEG4-CH2CH2COOH Other Details Molecular Formula: C19H29NO8 Molecular Weight: 399.4 CAS Number: 756526-00-8 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 100mg Leadtime:50 Days Sizes 2: 250mg Leadtime:50 Days Sizes 3: 1g Leadtime:50 Days