Uses: non-chemical insecticide, absorbent, filter medium, filler.

Diatomaceous Earth is an absorbent mineral formed from the remains of diatoms, and is composed mainly of amorphous silica.  Alternative names include diatomite and kieselguhr. 

Diatoms are microscopic unicellular algae of the phylum Bacillariophyta, and can occur in marine or fresh water.  Structurally in two halves – hence their name - their cell walls are impregnated with silica which builds up into large beds.  Diatomaceous earth is therefore found close to the sites of current or former water bodies.

Diatomaceous Earth is a popular alternative to chemical insecticides.  It is milled to a fine powder, producing irregularly shaped particles of silica which can penetrate the epicuticles of insects, causing death by dehydration.  Unlike conventional insecticides, its action is entirely mechanical, and it does not leave harmful chemical residues which may affect other animals.

We stock both calcined and non-calcined diatomaceous earth powders (<45 microns) and several granular grades are also available.

For further information please contact us.

RS Minerals Ltd

23 Allerston Way, Guisborough

Cleveland TS14 6GA

United Kingdom