Biotin-PEG1-NH2

• CAT Number: I044714
• CAS Number: 811442-85-0
• Molecular Formula: C14H26N4O3S
• Molecular Weight: 330.45
• Purity: ≥95%
• Synonyms: N-[2-(2-aminoethoxy)ethyl]-5-[(3aS,4S)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]pentanamide
• IUPAC Name: 5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-N-[2-(2-aminoethoxy)ethyl]pentanamide
• InChI: InChI=1S/C14H26N4O3S/c15-5-7-21-8-6-16-12(19)4-2-1-3-11-13-10(9-22-11)17-14(20)18-13/h10-11,13H,1-9,15H2,(H,16,19)(H2,17,18,20)/t10-,11-,13-/m0/s1
• InChIKey: MJCKXPHJERSYIX-GVXVVHGQSA-N
• SMILES: C1[C@H]2[C@@H]([C@@H](S1)CCCCC(=O)NCCOCCN)NC(=O)N2

Biotin-PEG1-NH2（Cat No.:I044714）is a bioconjugation reagent that combines biotin with a short polyethylene glycol (PEG1) spacer and a terminal amine group. The biotin moiety enables strong, specific binding to avidin or streptavidin proteins, making it ideal for labeling, detection, and purification applications. The PEG1 linker enhances water solubility and reduces steric hindrance, while the primary amine allows for efficient coupling to carboxylic acids or activated esters. This compound is widely used in biotechnological and biomedical research, including targeted drug delivery, diagnostics, and surface modification of nanoparticles or biomolecules.