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408719

Sigma-Aldrich

Polyethylenimine, ethylenediamine end-capped

average Mw ~800 by LS, average Mn ~600 by GPC

Sinónimos:

PEI, ethylenediamine branched

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About This Item

Fórmula lineal:
H(NHCH2CH2)nNH2
Número de CAS:
25987-06-8
MDL number:
MFCD00084427
UNSPSC Code:
12162002
NACRES:
NA.23

form

viscous liquid

Quality Level

200

mol wt

average Mn ~600 by GPC
average Mw ~800 by LS

refractive index

n20/D 1.5240

density

1.050 g/mL at 25 °C

InChI

1S/C2H8N2.C2H5N/c3-1-2-4;1-2-3-1/h1-4H2;3H,1-2H2

InChI key

SFLOAOINZSFFAE-UHFFFAOYSA-N

Categorías relacionadas

General description

Polyethyleneimine is a hydrophilic polymerwidely used as a non-viral synthetic vector for invivo delivery of therapeutic nucleic acids. Owing to its excellentphysicochemical properties, it is applied in many fields like the separationand purification of proteins, carbon dioxide absorption, drug carriers,effluent treatment, and biological labels.

Application

Branched PEI can be used as a precursor to synthesize conjugated polyplexes for efficient gene transfection. Conjugation of PEI with Jeffamine polyether and guanidinylation of the amino groups of PEI reduce the cytotoxicity of the polyplexes and protect them from aggregation in the presence of serum proteins.

Bamboo charcoal impregnated with PEI can be used as a CO2 adsorbent. Numerous amino groups present in PEI can react with CO2 due to acid-alkali interaction and enhance the adsorption capacity of bamboo charcoal.

It can also be used to prepare cross-linked water-soluble polymers with high coordination capabilities towards organic drug molecules.

Features and Benefits

  • Branched PEI has better complexation and buffering capacity.
  • High ion exchange capacity and affinity toward proteins.
  • SignificantDNA transfer efficiency.

Physical form

Branched polymer

signalword

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

356.0 °F

flash_point_c

180 °C

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Enzymes are biological catalysts that are comprised of small-molecule, metal, or cluster catalysts augmented by biopolymeric scaffolds. It is conceivable that early in chemical evolution, ancestral enzymes opted for simpler, easier to assemble scaffolds. Herein, we describe such possible protoenzymes:
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Small interfering RNAs (siRNAs) are powerful tools commonly used for the specific inhibition of gene expression. However, vectorization is required to facilitate cell penetration and to prevent siRNA degradation by nucleases. We have shown that diamond nanocrystals coated with cationic
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