30ml Gooch Crucible P4 30mm Dia Disc Pack of 5

Gooch CruciblesIdeal for drying precipitates to constant mass at 110?CAlso suitable for ignition work up to 450?C (see safety notice)With integral glass sintered discManufactured from chemically resistant Pyrex? borosilicate glassThe labelling P1, P2, P3 etc refers to the porosity of the sintered disc in the base of the crucible;P1 = pore index 100 to 160 microns, ISO 4793 designation P160 - coarse precipitate filtration, gas dispersion, coarse grain material filtrationP2 = pore index 40 to 100 microns, ISO 4793 designation P100, medium and crystalline preciptate filtration, medium filtration and washing of gasesP3 = pore index 16 to 40 microns, ISO 4793 designation P40 - analytical work with medium precipitatesP4 = pore index 10 to 16 microns, ISO 4793 designation P16 - analytical work with fine precipitatesP5 = pore index 4 to 10 microns, ISO 4793 designation P10 - principally used for bacterial filtrationSafety Notice:Avoid sudden changes in temperature which can result in thermal breakage.For high temperature ignition work, use a furnace and slowly heat to 450?C maximum.Allow to cool to below 200?C before removing from the furnace. Feefo Reviews More Information More Information MaterialBorosilicate glass