Biotin-PEG2-azide Product Catalog # Size Price (USD) Quantity Biotin-PEG2-azide271604-500MG500 mg$610.00 - Biotin-PEG2-azide-500mg quantity + Biotin-PEG2-azide271604-1G1 g$896.00 - Biotin-PEG2-azide-1g quantity + Add to cart Description Molecular Formula: C16H28N6O4S Molecular Weight: 400.4