Sign up





Any questions? Just let us know.

We will get back to you as soon as possible.
Please fill in all marked fields.

Subscribe to newsletter

Please provide your personal information.

KÖSTROSOL® 3530/3550

Colloidal silica slurry

General colloidal silica slurry:
Köstrosol is a milky mobile aqueous dispersion of amorphous silicon dioxide nanoparticles. This large-size colloidal silica has a negatively charged surface (anionic) which is stabilized by Alkaline (Na ). The particles are made from highpurity alkali silicate. They are spherical and generally non-crosslinked and are hydroxylated at the surface. Köstrosol colloidal silica is commonly used to polish glass, optical lenses, bearings, sapphire, and single crystals such as fluorspar.


  • General purpose colloidal silica designed to polish various optical materials.
  • Highly dilutable, allowing for onsite flexibility and reduced cost of ownership.
  • Not dangerous and not hazardous as defined by transport regulations.
  • Manufactured under ISO 9001, IS14001, and ISO 50001.


For more detailed information, download our datasheet:

Interested in our colloidal silica slurries?


We are happy to share our knowledge with you and remain at your disposal for any further questions.

Adam Nielsen

Product Manager Colloidal Silica Slurries