Back to shop

Kollisolv® PEG 300 G





Excellent solvent for a large number of substances that do not readily dissolve in water.

The low-molecular weight liquid polyethylene glycols Kollisolv® PEG 300 and Kollisolv® PEG 400 are excellent solvents for a large number of substances that do not readily dissolve in water. They are therefore widely used as solvents and solubilising agents for active substances and excipients in liquid and semi-solid preparations. It is the ability of PEGs to form complexes with active substances that is responsible for their excellent solvent power.

However, equilibrium constants for complex formation vary considerably from one substance to another, and certain drugs such as Penicillin G and Bacitracin can even become inactivated. The effect of the polyethylene glycol on the efficacy and absorption of a drug must therefore always be determined in tests. With regard to incompatible substances, please see the remarks in the European Pharmacopoeia, Vol. II/3, Monographs M1, Macrogol 300, p. 3. Polyethylene glycols can also be used to adjust the viscosity of liquid pharmaceutical preparations and ointments, to modify their absorption properties and to stabilise the preparation.

Why use Kollisolv® PEGs

  • Pharmaceutical grade IPEC GMP compliance
  • Versatile, water-miscible solvent vehicle for use in a multitude of drug formulations ranging from liquid and solid oral dosage forms to topical ointments and suppositories
  • Can be paired with BASF surfactants (for example Kolliphor® RH 40) to promote solubilization of poorly water-soluble APIs
  • May be formulated with BASF polymers (for example Kollidon® 12 PF) for crystallization inhibition
  • Combine low and high molecular weight PEG excipients to customize a waterwashable formulation base for topical ointments
  • Can also be used as a chemical intermediate in drug formulation

Additional information




Ph.Eur., USP-NF



Technical Name

macrogol, polydiol, Polyethylene glycol, polyglycol, polyoxyethylene


Emollient, Plasticization, solubilizers, Solvent

Dosage Form

Capsules, liquid formulations, Multiparticulates, Pellets, semi-solid preparations, tablets, granules

Documents and Links

BASF Product Overview


You may also like…

Kollidon® 25

BASF Select options