Biotin-PEG4-azide-500mg$500.00 Biotin-PEG4-azide Product Catalog # Size Price (USD) Quantity Biotin-PEG4-azide-500mg 271606-500MG 500 mg $500.00 - Biotin-PEG4-azide-500mg quantity + For more size options, please click: Biotin-PEG4-azide Add to cart Additional information Additional information Weight 0.0005 kg Size 500 mg For Research & Development use only. Not for testing and/or use on humans.