Biotin-PEG2-amine Product Catalog # Size Price (USD) Quantity Biotin-PEG2-amine271601-500MG500 mg$473.00 - Biotin-PEG2-amine-500mg quantity + Biotin-PEG2-amine271601-1G1 g$705.00 - Biotin-PEG2-amine-1g quantity + Add to cart Description CAS #: 138529-46-1 Molecular Formula: C16H30N4O4S Molecular Weight: 374.5