Mal-PEG6-COOH Product Catalog # Size Price (USD) Quantity Mal-PEG6-COOH285702-500MG500 mg$510.00 - Mal-PEG6-COOH-500mg quantity + Mal-PEG6-COOH285702-1G1 g$765.00 - Mal-PEG6-COOH-1g quantity + Add to cart Description CAS #: 1334177-79-5 Molecular Formula: C22H36N2O11 Molecular Weight: 504.5