mPEG8-Propyne Product Catalog # Size Price (USD) Quantity mPEG8-Propyne283903-1G1 g$460.00 - mPEG8-Propyne-1g quantity + mPEG8-Propyne283903-5G5 g$1,499.00 - mPEG8-Propyne-5g quantity + Add to cart Description Synonym: mPEG8-CH2C≡CH CAS #: 880081-81-2 Molecular Formula: C20H38O9 Molecular Weight: 422.5