1013921-36-2, Alkyne-PEG4-NH2, HC≡C-CH2-PEG4-NH2 Product Specifications: l  Synonym:NH2-PEG4-Propyne,ALK-PEG4-NH2. l  Catalog Numbers:PS2-NAK-4. l  Appearance:Colorless Liquid. l  Stability:-18℃ for long term storage,avoid light. l  Molecular Weight:231.29. l  CAS No.:1013921-36-2. l  Molecular formula:C11H21NO4. l  Purity:>97%.   This product is for research use only and is not intended for use in humans or for diagnostic use.