Registration Dossier
Registration Dossier
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EC number: 266-046-0 | CAS number: 65997-17-3 This category encompasses the various chemical substances manufactured in the production of inorganic glasses. For purposes of this category, 'glass' is defined as an amorfous, inorganic, transparent, translucent or opaque material traditionally formed by fusion of sources of silica with a flux, such as an alkali-metal carbonate, boron oxide, etc. and a stabilizer, into a mass which is cooled to a rigid condition without crystallization in the case of transparent or liquid-phase separated glass or with controlled crystallization in the case of glass-ceramics. The category consists of the various chemical substances, other than by-products or impurities, which are formed during the production of various glasses and concurrently incorporated into a glass mixture. All glasses contain one or more of these substances, but few, if any, contain all of them. The elements listed below are principally present as components of oxide systems but some may also be present as halides or chalcogenides, in multiple oxidation states, or in more complex compounds. Trace amounts of other oxides or chemical compounds may be present. Oxides of the first seven elements listed* comprise more than 95 percent, by weight, of the glass produced. @Aluminium*@Lead@Boron*@Lithium@Calcium*@Manganese@Magnesium*@Molybdenum@Potassium*@Neodymium@Silicon*@Nickel@Sodium*@Niobium@Antimony@Nitrogen@Arsenic@Phosphorus@Barium@Praseodymium@Bismuth@Rubidium@Cadmium@Selenium@Carbon@Silver@Cerium@Strontium@Cesium@Sulfur@Chromium@Tellurium@Cobalt@Tin@Copper@Titanium@Germanium@Tungsten@Gold@Uranium@Holmium@Vanadium@Iron@Zinc@Lanthanum@Zirconium
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Bivariate size distribution from scanning electron microscopy of aerosol samples of E-glass microfibre showing fibres/mL per size category is presented. It is found in one study that the E-glass microfibre has the follwoing size information: Geometric Length (um): 3.5, mean geometric diameter (um): 0 .25, and mean specific surface area (m2/g): 3.43.
The results of a second granulometry study showed that the diameter of the E-glass microfibre is <0.9 um (in fact 97% was <0.4 um), and that the length of 97% of the E-glass microfibre is < 20 um.
Additional information
Published information is presented on the particle size distribution of E-glass microfibre. This size distribution is a pre-selection of the commercial product to obtain rat respirable fibres for these studies. The commercial product may have a different distribution depending upon application.
It is evaluated that E-glass microfibre is inhalable (i.e. particle size <100 um). Aerodynamic diameters corresponding to the fibre density, diameter and length is calculated for E-glass microfibre by the registrant and found to be below 4 um (E-glass microfibre is respirable). It is concluded that inhalation is the most appropriate exposure route.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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