mPEG11-OH Product Catalog # Size Price (USD) Quantity mPEG11-OH281409-5G5 g$499.00 - mPEG11-OH-5g quantity + mPEG11-OH281409-25G25 g$1,150.00 - mPEG11-OH-25g quantity + Add to cart Description Synonym: Undecaethylene Glycol Monomethyl Ether CAS #: 114740-40-8 Molecular Formula: C23H48O12 Molecular Weight: 516.6