NHS-PEG4-NHS Product Catalog # Size Price (USD) Quantity NHS-PEG4-NHS281903-1G1 g$430.00 - NHS-PEG4-NHS-1g quantity + NHS-PEG4-NHS281903-5G5 g$1,075.00 - NHS-PEG4-NHS-5g quantity + Add to cart Description Synonym: α, ω-Disuccinimidyl tetraethylene glycol CAS #: 756526-03-1 Molecular Formula: C22H32N2O13 Molecular Weight: 532.5