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Ethylene imine polymer


  • Crystallization grade Ethylene imine polymer solution for formulating screens or for optimization


  •  Sterile filtered solution
  • Formulated in Type 1+ ultrapure water: 18.2 megaohm-cm resistivity at 25°C, < 5 ppb Total Organic Carbon, bacteria free (<1 Bacteria (CFU/ml)), pyrogen free (<0.03 Endotoxin (EU/ml)), RNase-free (< 0.01 ng/mL) and DNase-free (< 4 pg/µL)


Ethylene imine polymer

Synonyms: PEI or Poly(ethylene imine) or Poly(ethyleneimine) solution or Ethyleneimine polymer solution
Mr 600,000 to 1,000,000
CAS [9002-98-6]
EC Number 205-793-9
MDL Number MFCD00084427
PubChem Substance ID 24845612
Sterile filtered solution
Density 1.08 g/mL at 20°C
Refractive Index N20/D: 1.440 - 1.455
Structural Viscosity: 18 - 40PAS
Appearance (Color): Faint yellow to yellow in color; clear to slightly opaque viscous liquid
Ethylene imine polymer is utilized in Crystal Screen 2 crystallization screen

Measured Refractive Index Range: 1.45032 - 1.45291 at 20°C
Measured Conductivity Range: 237.5 - 320.0 µS/cm at 25°C




50% Ethylene imine polymer


200 mL



Support Material(s)

Certificate Of Analysis


1. Acta Cryst. (2004). D60, 952-953, Crystallization of the mosquito-larvicidal binary toxin produced by Bacillus sphaericus A. W. Smith, A. Camara-Artigas and J. P. Allen.

2. Acta Cryst. (2010). D66, 685-697, A crystallization screen based on alternative polymeric precipitants, C. Grimm, A. Chari, K. Reuter and U. Fischer.