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❮ BioPure: Low Endotoxin

BioPure Gold Nanospheres – BPEI

Branched Polyethylenimine (BPEI) is a 25 kDa polymer which contains a large number of free amines on the particle surface that are available for charge interactions with other target biomolecules or substrates. Learn more ❯

BioPure materials are high quality, unagglomerated, and monodisperse nanoparticles. Extensively purified and provided with low endotoxin. Ideal for in-vivo and in-vitro research applications. Learn more ❯

Provided at 1 mg/mL in water.

Need particles for conjugation? See BioReady Gold.

Don’t see the size you’re looking for? Please contact us about custom and semi-custom ordering.

Select Diameter
Concentration & Solvent
Select Volume

Bulk purchasing options are available – please contact us if you are interested

Typically ships within 5 business days

Product number: AUBB10-1M

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Specifications & CoA

TEM Diameter Size Distribution (CV) Example Certificate of Analysis
(How do I read this?)
10 nm ± 2 nm ≤ 12% Download Example CoA
50 nm ± 4 nm ≤ 15% Download Example CoA
100 nm ± 8 nm ≤ 15% Download Example CoA

Note: approximate ranges below are dependent on diameter

  • Endotoxin Concentration: < 2.5 EU/mL (< 5. EU/mL for ≤ 20 nm sizes)
  • Hydrodynamic diameter (DLS): TEM diameter plus 15 to 40 nm
  • Zeta potential: 25 to 85 mV
  • pH of solution: 7. to 8.5
  • Particle surface: BPEI
  • Solvent: USP Purified Water
  • Peak wavelength (λmax): 515 to 570 nm

Molarity and particle concentration table ❯


More Info & Documentation

nanoComposix University

Peer-Reviewed Papers

AUBB 5nm 10nm 20nm 40nm 50nm 60nm 100nm



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