perlite chemical formula

Slightly soluble in dilute strong acids . Dipendra Shastri and H. S. Kim, “A new consolidation process for expanded perlite particles”, Construction and Building Materials, Vol 60, June, 2014, pp.1–7. Fax: +90 312 223 5665. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 10 mg/m3 total exposure and 5 mg/m3 respiratory exposure over an 8-hour workday. Elements listed: Al, H, K, O, Si - search for minerals with similar chemistry. Expanded perlite can be manufactured to weigh as little as 2 pounds per cubic foot (32kg/m 3) making it adaptable for numerous applications. [12], Perlite is used in cosmetics as an absorbent and mechanical exfoliant. Perlite is an amorphous volcanic glass (SiO2) that has relatively high water content, typically formed by the hydration of obsidian. 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. 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. Typical Physical Characterictics of Perlite 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 most common oxidation states found in nature are +3, +5, and -3. The world reserves of perlite are estimated at 700 million tonnes. 1-3, p. 467). Expanded perlite powder or granules, CAS# 93763-70-3 Hazardous ACGIH Ingredients CAS# % TLV, mg/cu.m. 93763-70-3 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. Merhale Sok. .1 Although much research has been performed on the chemical and structural composition, there is not yet complete agreement on the exact formula. Calcium silicate is a key industrial chemical compound used in applications requiring high strength and durability. 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. Substance name : PERLITE Product code : SIP6720.73 Formula : Na2OK2OAl2O3SiO2 Synonyms : SODIUM POTASSIUM ALUMINUM SILICATE Chemical family : INORGANIC SILICATE 1.2. 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… Perlite | Al2CaFe2K2MgNa2O12Si | CID 133082075 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. What was needed was a coordinated effort, a continuing campaign to secure the future of the perlite industry—an industry of hig… Perlite is currently used in commercial pool filtration technology, as a replacement to diatomaceous earth filters. The ACGIH has a TLV-TWA of 10 mg/m3 for perlite as total dust containing less than 1 percent quartz. Calcium silicate is a chemical compound composed of calcium and silica with the chemical formula Ca 2 SiO 4 that is naturally found in limestone. Chemical Stability; Silicate-bonded Perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. 93763-70-3 . Substitutes include:[18]. Cell Dimensions: a = 5.417, Z = 4; V = 158.96 Den (Calc)= 5.01. Perlite concrete mixed at a ratio of 1 part cement to 6 parts perlite has an insulation value, or "k" value, of 0.64 and a compressive strength of 125 to 200 pounds per square inch. They are composed of iron oxide and one [11], In horticulture, perlite can be used as a soil amendment or alone as a medium for hydroponics or for starting cuttings. SECTION 4: FIRST AID MEASURES 4.1. Perlite is a non-renewable resource. X Ray Diffraction: By Intensity (I/I o ): 1.6332 (1), 2.709 (0.85), 2.423 (0.65), Forms: Mouse. Fax: +90 312 223 5665. Other reported reserves are: Greece - 120 million tonnes, Turkey, USA and Hungary - about 49-57 million tonnes. [19], For the two-phased structure in steel, see. Expanded and/or Milled Perlite products represent a heat processed inorganic, inert material that does not constitute any known health hazards and is non-combustible. Environmental, Chemistry & Hazardous Materials News, Careers & Resources. 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. In the construction and manufacturing fields, it is used in lightweight plasters, concrete and mortar, insulation and ceiling tiles. Skip to page content; Skip to site menu on this page. [13][14], Perlite can be substituted for all of its uses. [1], Perlite softens when it reaches temperatures of 850–900 °C (1,560–1,650 °F). 310-127-6: 100% WT . 12427-27-9 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. CaO 1.0269 Composition Comments The data shown are in accordance with the latest EC Directives. [5][6], Perlite world production, led by China, Turkey, Greece, USA, Armenia and Hungary, summed up to 4.6 million tonnes in 2018. 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. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. Due to thermal and mechanical stability, non-toxicity, and high resistance against microbial attacks and organic solvents, perlite is widely used in biotechnological applications. seq. CAS Number . Several products exist in the market to provide perlite based filtration. The Perlite Institute was founded in 1949, a year in which it is estimated only 80,000 tons of perlite ore was mined throughout the world. Perlite is reported to have a free-silica content varying from zero to 3 percent (Anderson, Selvig, Baur et al. For these reasons, the final rule establishes an 8-hour PEL of 15 mg/m3 TWA for total perlite dust containing less than 1 percent quartz and retains the 5-mg/m3 TWA PEL for the respirable fraction of perlite dust. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. CDC twenty four seven. Perlite was found to be an excellent support for immobilization of biocatalysts such as enzymes for bioremediation and sensing applications. Potassium silicate is sometimes preferred for applications where heat insulation and fire resistance are the main objectives. Chemical Characteristics—Perlite is neutral with a pH of 7.0–7.5, but it has no buffering capacity and contains no mineral nutrients. Tel: +90 312 223 5665. This rule was remanded by the U.S. EnvironmentalChemistry.com. 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. 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. Chemical Name, Empirical Formula . This is to be expected when different workers have examined the many different varieties. [5][6]. The expanded material is a brilliant white, due to the reflectivity of the trapped bubbles. 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). Perlite is an excellent filtration aid and is used extensively as an alternative to diatomaceous earth. Several perlite filters and perlite media have met NSF-50 approval (Aquify PMF Series and AquaPerl) , which standardizes water quality and technology safety and performance. OSHA concludes that these limits protect workers from the significant risk of eye, skin, and other forms of physical irritation. 1956 and the Perlite Institute, both as cited in ACGIH 1986/Ex. 8-47, Table N4). Occupational Safety and Health Administration, National Institute for Occupational Safety and Health, "Chemical, mineralogical and structural features of native and expanded perlite from Macedonia", "Perlite toxicology and epidemiology – a review", "General Information - Mining Resources - www.minenergy.am", "USGS Mineral Commodity Summaries - PERLITE", Emulsion explosive composition containing expanded perlite, "PERLITE : (Data in thousand metric tons unless otherwise noted)", "CDC – NIOSH Pocket Guide to Chemical Hazards – Perlite", CDC – NIOSH Pocket Guide to Chemical Hazards, https://en.wikipedia.org/w/index.php?title=Perlite&oldid=995618170, Creative Commons Attribution-ShareAlike License, 3–5% loss on ignition (chemical / combined water), This page was last edited on 22 December 2020, at 00:43. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. Perlite is a non-renewable resource. Chemical Properties of SericiteHide. This formula is commonly used in water treatment. Tel: +90 312 223 5665. The confirmed resources of perlite existing in Armenia amount to 150 million m3, whereas the total amount of projected resources reaches up to 3 billion m3. Because of its low density and relatively low price (about US$50 per tonne of unexpanded perlite), many commercial applications for perlite have developed. Ferrite, a ceramic-like material with magnetic properties that are useful in many types of electronic devices. Formula: KAl 2 (AlSi 3 O 10)(OH) 2. Its water content, however, is considerably higher (generally 3 to 4 percent); much of it is absorbed, subsequent to consolidation, from the sea or from wet sediments into which the perlite … OSHA has classified Perlite as a Particulate Not Otherwise Regulated (PNOR), which has the same Permissible Exposure Limit (PEL) as that used for nuisance and inert dusts. Perlite is an amorphous mineral consisting of fused sodium potassium aluminium silicate. Mostly chemically inert. [7] It may also be used to build composite materials that are sandwich-structured[8] or to create syntactic foam.[9]. Potassium silicate is sometimes preferred for applications where heat insulation and fire resistance are the main objectives. Mobile: +90 533 273 7786 It can expand to as much as twenty times its original volume. Moderately soluble (<10%) in 1 molar NaOH. Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. 1-3, p. 467). Perlite is a natural volcanic glass; it is essentially an amorphous mineral consisting of fused sodium-potassium-aluminum silicate. When used as an amendment, it has high permeability and low water retention and helps prevent soil compaction. 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. Chemical Stability Silicate-bonded perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3. Chemical Formula: (Mg,Fe++,Al)3(Al,Si)4O10(OH)2•4(H2O) Composition: Molecular Weight = 504.19 gm Magnesium 8.68 % Mg 14.39 % MgO Aluminum 23.01 % Al 43.48 % Al 2 O 3 Iron 9.97 % Fe 12.82 % FeO Silicon 5.57 % Si 11.92 % SiO 2 Hydrogen 2.00 % H 17.87 % H 2 O Oxygen 50.77 % O No chemical incompatibilities reported. 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. Address: Bestepeler Mah. No: 69/4 06510 Yenimahalle - Ankara Turkey. Saving Lives, Protecting People, The National Institute for Occupational Safety and Health (NIOSH), National Institute for Occupational Safety and Health, U.S. Department of Health & Human Services. OSHA comments from the January 19, 1989 Final Rule on Air Contaminants Project extracted from 54FR2332 et. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. The popularity of perlite usage as a filter medium is growing considerably worldwide. Perlite is a natural volcanic mineral composed of sodium potassium aluminum silicate. 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. Dbl Clk - Start-Stop Rotation. [4] Considering specific density of 1.1 ton/m3 confirmed reserves in Armenia amount to 136 million tons. The ACGIH has a TLV-TWA of 10 mg/m 3 for perlite as total dust containing less than 1 percent quartz. Perlite has the unusual characteristic of expanding and becoming porous when it is heated. As perlite contains silicon dioxide, goggles and silica filtering masks are recommended when handling large quantities. The Occupational Safety and Health Administration (OSHA) has set the legal limit (permissible exposure limit) for perlite exposure in the workplace as 15 mg/m3 total exposure and 5 mg/m3 respiratory exposure over an 8-hour workday. Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. OSHA formerly regulated perlite under its generic total particulate limit of 15 mg/m 3. Small quantities of perlite are also used in foundries, cryogenic insulation, and ceramics (as a clay additive). Perlite filters are fairly commonplace in filtering beer before it is bottled. CAS: None; Chemical Formula: None. They have extremely low solubility’s in mineral and organic acids at … Address: Bestepeler Mah. It is also used by the explosives industry.[10]. Odorless, light-gray to glassy-black solid. Expanded perlite [Note: An amorphous material consisting of fused sodium potassium aluminum silicate.] No: 69/4 06510 Yenimahalle - Ankara Turkey. [Note: Expanded perlite is a fluffy, white particulate.] 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. Water trapped in the structure of the material vaporises and escapes, and this causes the expansion of the material to 7–16 times its original volume. Merhale Sok. Relevant identified uses of the substance or mixture and uses advised against Use of the substance/mixture : Chemical intermediate For research and industrial use only 1.3. The world reserves of perlite are estimated at 700 million tonnes. There are no published reports of adverse physiologic effects from exposure to perlite dust. Dicalite® perlite filter aids are processed at temperatures exceeding 800 °C (1500 °F) which eliminates organic matter. You will be subject to the destination website's privacy policy when you follow the link. 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]. NIOSH, the only commenter on perlite, has not reviewed the evidence for this substance in depth (Ex. Vermiculite is not considered to be a single mineral specified but a family of related minerals. Wikipedia quotes ASTM C71 on the definition of refractory: “non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F.”They are commonly used, for instance, to line kilns and other high-temperature furnaces. The respirable fraction limit of 5 mg/m3 is also retained. Soluble in hot concentrated alkali and HF. Very slightly soluble in water or weak acids. This page contains information on the chemical Perlite including: 5 synonyms/identifiers. 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). Mobile: +90 533 273 7786 Perlite is a type of rhyolite with a chemical composition, index of refraction, and specific gravity similar to those of obsidian. It is an industrial mineral and a commercial product useful for its low density after processing. Chemical Database Perlite … Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. Percentage (%) Expanded and/or Milled Perlite Ore . OSHA formerly regulated perlite under its generic total particulate limit of 15 mg/m3. At a ratio of 1 part cement to 4 parts perlite, you achieve a "k" value of 0.83 and compressive strength of 350 to 500 pounds per inch. EINECS Number . Md Arifuzzaman and H. S. Kim, Novel flexural behaviour of sandwich structures made of perlite foam/sodium silicate core and paper skin, Construction and Building Materials, Construction and Building Materials, Vol 148 2017, pp 321–333. Calcium silicate has a high water absorption rate and a low bulk density. Centers for Disease Control and Prevention. Circuit Court of Appeals and the limits are not currently in force. PERLITE is non-flammable and non-combustible. Accordance with the latest EC Directives and -3 related minerals = 4 ; V = Den! Ton/M3 confirmed reserves in Armenia amount to 136 million tons material which completely. And structural composition, there is not considered to be expected when different have!. [ 10 ] percent ( Anderson, Selvig perlite chemical formula Baur et Al, Chemistry & Materials. 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And ceiling tiles for applications where heat insulation and ceiling tiles formula: Na2OK2OAl2O3SiO2 Synonyms: SODIUM potassium silicate! The accuracy of a non-federal website is classified as chemically inert and has the unusual characteristic of and. Common oxidation states found in nature are +3, +5, and -3 water... Potassium ALUMINUM silicate Prevention ( CDC ) can not attest to the destination 's! Research has been performed on the exact formula from 54FR2332 et 1,560–1,650 °F ) which eliminates organic....
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