Naphrax is made exclusively by Brunel Microscopes Ltd in the UK who distribute                   it Worldwide in versions suitable for the UK and Export.

                  It is available in 15ml (£48) and 250ml (£318) amounts.

                  From our online shop by credit card, Paypal or BACS payment or in the case of UK                   universities by Purchase Order number -    Click Here

                  Due to carrier restrictions Naphrax without toluene is supplied for our overseas                   customers with instructions about how the solvent is added on receipt.                   Prepayment is required unless you already have an account with us -                      Email us for a Proforma Invoice      or      Buy in our Online Shop

                  A copy of the instructions for use and how to add toluene for overseas                   customers is available on line - Click here.

                 To download a MSDS sheet for Naphrax - Click here.

                    Brunel Microscopes Ltd

                 2 Vincients Road

                 Bumpers Farm Industrial Estate

                 Chippenham Wiltshire SN14 6NQ




                          Telephone: +441249 462655


The mountant of choice for diatom microscopy assays

Diatoms are single-celled algae that live in structures made of glass. They are the only organism on the planet with cell walls composed of transparent, opaline silica. Diatom cell walls are ornamented by intricate and striking patterns of silica which can be used to distinguish the various species. From a microscopy perspective because diatoms have a refractive index very similar to glass to make these very intricate structures visible a mountant with a much higher refractive index is required. Naphrax is now internationally recognised as the mountant of choice.

In solution the refractive index of Naphrax is 1.65. As part of the mounting process the naphrax is heated and the solvent toluene is driven off and the refractive index rises to 1.73.

The microscopy of diatoms benefits significantly from the use of phase contrast and dark ground illumination systems.

Phase contrast and dark ground microscopes