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Kolliphor ELP is a white to yellowish paste or cloudy liquid. It is a non-ionic solubilizer made by reacting castor oil with ethylene oxide in a molar ratio of 1:35. This is followed by a purification process. Kolliphor ELP forms clear solutions in water and also dissolves in a wide range of organic solvents, such as ethanol, n-propanol, isopropanol, ethyl acetate, chloroform, carbon tetrachloride, trichloroethylene, toluene and xylene.


  • Highly purified Kolliphor® EL grade (Polyoxyl-35-castor oil)
  • Endotoxin controlled
  • Excellent compatibility with other ingredients
  • Purified solubilizer for paclitaxel formulations
  • Especially suitable for formulations containing extremely sensitive APIs
  • Compliant with Ph. Eur. and USP-NF
  • Also stabilizes biologic drug formulations


Emulsifiers / Surfactants, Solubilizers

Technical Overview

Compendial Name

Macrogolglycerol ricinoleate, PEG-35 castor oil

Region of Manufacture


Package Size

  • 0,5KG Aluminum bottle
  • 60KG Steel drums
  • 0,5KG Plastic bottle
  • 5KG Composite packaging

See all technical details about Kolliphor® ELP

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