perlite chemical formula

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The expanded material is a brilliant white, due to the reflectivity of the trapped bubbles. It is also used by the explosives industry.[10]. OSHA formerly regulated perlite under its generic total particulate limit of 15 mg/m3. Md Arifuzzaman and H. S. Kim, "Prediction and evaluation of density and volume fractions for the novel perlite composite affected by internal structure formation", Construction and Building Materials, Vol 141, 2017, 201–215. In its processed crude and expanded forms, perlite is reported to have a measurable quartz content of 0.4 percent quartz and 0.2 percent cristobalite (Sheckler 1977, as cited in ACGIH 1986/Ex. [13][14], Perlite can be substituted for all of its uses. Expansion occurs when the glassy lava rock is heated to 1600 degrees F (871 degrees C) and the water molecules trapped in the rock turn into vapor c… Chemical Characteristics—Perlite is neutral with a pH of 7.0–7.5, but it has no buffering capacity and contains no mineral nutrients. Chemical Stability Silicate-bonded perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. Chemical Stability; Silicate-bonded Perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. 1-3, p. 467). Chemical Database Perlite … Substance name : PERLITE Product code : SIP6720.73 Formula : Na2OK2OAl2O3SiO2 Synonyms : SODIUM POTASSIUM ALUMINUM SILICATE Chemical family : INORGANIC SILICATE 1.2. Mobile: +90 533 273 7786 You will be subject to the destination website's privacy policy when you follow the link. Small quantities of perlite are also used in foundries, cryogenic insulation, and ceramics (as a clay additive). Elements listed: Al, H, K, O, Si - search for minerals with similar chemistry. Dicalite® perlite filter aids are processed at temperatures exceeding 800 °C (1500 °F) which eliminates organic matter. 12427-27-9 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. Perlite is reported to have a free-silica content varying from zero to 3 percent (Anderson, Selvig, Baur et al. In the construction and manufacturing fields, it is used in lightweight plasters, concrete and mortar, insulation and ceiling tiles. This page contains information on the chemical Perlite including: 5 synonyms/identifiers. seq. Water systems must achieve at least 99.9 percent (3-log) removal or inactivation of G. lamblia cysts and 99.99 percent (4-log) removal or inactivation of viruses. Tel: +90 312 223 5665. [11], In horticulture, perlite can be used as a soil amendment or alone as a medium for hydroponics or for starting cuttings. No chemical incompatibilities reported. Dbl Clk - Start-Stop Rotation. Odorless, light-gray to glassy-black solid. This formula is commonly used in water treatment. The inert nature and neutrality of perlite make it a favorable medium for assessing the usefulness of various forms and levels of nutrients (Arquero et al., 2006; Wik et al., 2006). As perlite contains silicon dioxide, goggles and silica filtering masks are recommended when handling large quantities. SECTION 4: FIRST AID MEASURES 4.1. The unusual properties and advantages of this virtually new material had been known for some time, yet recognition and acceptance was impeded due to a lack of reliable technical data, uniform commercial standards and sufficient public information. [4] Considering specific density of 1.1 ton/m3 confirmed reserves in Armenia amount to 136 million tons. Pearlite is a two-phased, lamellar (or layered) structure composed of alternating layers of ferrite (87.5 wt%) and cementite (12.5 wt%) that occurs in some steels and cast irons.During slow cooling of an iron-carbon alloy, pearlite forms by a eutectoid reaction as austenite cools below 723 °C (1,333 °F) (the eutectoid temperature). Soluble in hot concentrated alkali and HF. No: 69/4 06510 Yenimahalle - Ankara Turkey. PERLITE According to Regulation (EU) No 453/2010 NA 2O 3.3014 TiO2 0.1120 MgO 0.1668 MnO 0.0924 Al2O3 13.1689 Fe2O 1.0960 SiO2 71.4066 Loss of Ignition 4.0210 K2O 5.6080 Moisture % 1 max. The high charge per formula unit gives vermiculite a high cation exchange capacity and causes vermiculte to have a high affinity for weakly hydrated cations such as K + , NH 4 + , and Cs + . The world reserves of perlite are estimated at 700 million tonnes. Environmental, Chemistry & Hazardous Materials News, Careers & Resources. Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3. EINECS Number . Ferrites are hard, brittle, iron-containing, and generally gray or black and are polycrystalline—i.e., made up of a large number of small crystals. Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. Substitutes include:[18]. Perlite is an amorphous volcanic glass (SiO2) that has relatively high water content, typically formed by the hydration of obsidian. Perlite is a type of rhyolite with a chemical composition, index of refraction, and specific gravity similar to those of obsidian. Unexpanded ("raw") perlite has a bulk density around 1100 kg/m3 (1.1 g/cm3), while typical expanded perlite has a bulk density of about 30–150 kg/m3 (0.03–0.150 g/cm3).[2]. Address: Bestepeler Mah. Other reported reserves are: Greece - 120 million tonnes, Turkey, USA and Hungary - about 49-57 million tonnes. Perlite can be safely disposed of through existing sewage systems, although some pool operators choose to separate the perlite using settling tanks or screening systems to be disposed of separately. Formula Oxidation State Organic nitrogen Org-N Ammonia, NH 3-3 Ammonium ion NH 4 +-3 Hydrazine N 2H 4-2 Hydroxylamine NH 2OH -1 Nitrogen gas N 2 0 Nitrous oxide N 2O +1 Nitric oxide ... chemical family as nitrogen. Perlite filters are fairly commonplace in filtering beer before it is bottled. Typical Physical Characterictics of Perlite 93763-70-3 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. A typical formula for an idealized vermiculite weathered from muscovite is: M 0.75 + Al 2 (Si 3.25 Al 0.75) O 10 (OH) 2, where M + represents exchangeable cations. What was needed was a coordinated effort, a continuing campaign to secure the future of the perlite industry—an industry of hig… Perlite is an excellent filtration aid and is used extensively as an alternative to diatomaceous earth. NIOSH, the only commenter on perlite, has not reviewed the evidence for this substance in depth (Ex. Calcium silicate has a high water absorption rate and a low bulk density. OSHA finds that perlite is nontoxic when airborne total particulate concentrations are maintained at levels of 15 mg/m3 or below and when its quartz content is limited to a level below 1 percent crystalline silica. [12], Perlite is used in cosmetics as an absorbent and mechanical exfoliant. The proposed PELs were 10 mg/m3 (total particulate) and 5 mg/m3 TWA (respirable particulate): however, the final rule retains the 15-mg/m3 TWA PEL for perlite as total particulate containing less than 1 percent quartz. 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