Biotin-PEG8-NHS Product Catalog # Size Price (USD) Quantity Biotin-PEG8-NHS271617-500MG500 mg$741.00 - Biotin-PEG8-NHS-500mg quantity + Biotin-PEG8-NHS271617-1G1 g$1,167.00 - Biotin-PEG8-NHS-1g quantity + Add to cart Description Molecular Formula: C33H56N4O14S Molecular Weight: 764.9