perlite chemical formula

Vermiculite is not considered to be a single mineral specified but a family of related minerals. 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. 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 … 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. Perlite is a non-renewable resource. 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. Expanded perlite can be manufactured to weigh as little as 2 pounds per cubic foot (32kg/m 3) making it adaptable for numerous applications. Chemical Name, Empirical Formula . [1], Perlite softens when it reaches temperatures of 850–900 °C (1,560–1,650 °F). Chemical Characteristics—Perlite is neutral with a pH of 7.0–7.5, but it has no buffering capacity and contains no mineral nutrients. Perlite is an excellent filtration aid and is used extensively as an alternative to diatomaceous earth. OSHA comments from the January 19, 1989 Final Rule on Air Contaminants Project extracted from 54FR2332 et. Very slightly soluble in water or weak acids. They are composed of iron oxide and one 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. 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. 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. NIOSH, the only commenter on perlite, has not reviewed the evidence for this substance in depth (Ex. 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. 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. Address: Bestepeler Mah. Mostly chemically inert. Mobile: +90 533 273 7786 Tel: +90 312 223 5665. This is to be expected when different workers have examined the many different varieties. This formula is commonly used in water treatment. Merhale Sok. No chemical incompatibilities reported. They have extremely low solubility’s in mineral and organic acids at … Moderately soluble (<10%) in 1 molar NaOH. 1956 and the Perlite Institute, both as cited in ACGIH 1986/Ex. Environmental, Chemistry & Hazardous Materials News, Careers & Resources. This rule was remanded by the U.S. Perlite is an amorphous mineral consisting of fused sodium potassium aluminium silicate. OSHA formerly regulated perlite under its generic total particulate limit of 15 mg/m3. 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). Dicalite® perlite filter aids are processed at temperatures exceeding 800 °C (1500 °F) which eliminates organic matter. Expanded perlite [Note: An amorphous material consisting of fused sodium potassium aluminum silicate.] The ACGIH has a TLV-TWA of 10 mg/m3 for perlite as total dust containing less than 1 percent quartz. OSHA concludes that these limits protect workers from the significant risk of eye, skin, and other forms of physical irritation. Circuit Court of Appeals and the limits are not currently in force. 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. [19], For the two-phased structure in steel, see. Perlite filters are fairly commonplace in filtering beer before it is bottled. Perlite is reported to have a free-silica content varying from zero to 3 percent (Anderson, Selvig, Baur et al. 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. The ACGIH has a TLV-TWA of 10 mg/m 3 for perlite as total dust containing less than 1 percent quartz. The respirable fraction limit of 5 mg/m3 is also retained. Substitutes include:[18]. It is an industrial mineral and a commercial product useful for its low density after processing. Dbl Clk - Start-Stop Rotation. It can expand to as much as twenty times its original volume. [13][14], Perlite can be substituted for all of its uses. Odorless, light-gray to glassy-black solid. 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. Chemical Properties of SericiteHide. It is also used by the explosives industry.[10]. Chemical Stability; Silicate-bonded Perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. Perlite is a natural volcanic glass; it is essentially an amorphous mineral consisting of fused sodium-potassium-aluminum silicate. 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. Chemical Stability Silicate-bonded perlite makes an insulation material which is completely non-flammable, the refractory nature of the bond being a major advantage. Potassium silicate is sometimes preferred for applications where heat insulation and fire resistance are the main objectives. 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. 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. 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. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. [Note: Expanded perlite is a fluffy, white particulate.] OSHA formerly regulated perlite under its generic total particulate limit of 15 mg/m 3. Perlite is a non-renewable resource. Perlite is currently used in commercial pool filtration technology, as a replacement to diatomaceous earth filters. Perlite | Al2CaFe2K2MgNa2O12Si | CID 133082075 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. In the construction and manufacturing fields, it is used in lightweight plasters, concrete and mortar, insulation and ceiling tiles. Several products exist in the market to provide perlite based filtration. Mobile: +90 533 273 7786 There are no published reports of adverse physiologic effects from exposure to perlite dust. 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… [5][6], Perlite world production, led by China, Turkey, Greece, USA, Armenia and Hungary, summed up to 4.6 million tonnes in 2018. CaO 1.0269 Composition Comments The data shown are in accordance with the latest EC Directives. What was needed was a coordinated effort, a continuing campaign to secure the future of the perlite industry—an industry of hig… Typical Physical Characterictics of Perlite PERLITE is non-flammable and non-combustible. Expanded perlite powder or granules, CAS# 93763-70-3 Hazardous ACGIH Ingredients CAS# % TLV, mg/cu.m. EnvironmentalChemistry.com. Address: Bestepeler Mah. Perlite was found to be an excellent support for immobilization of biocatalysts such as enzymes for bioremediation and sensing applications. As perlite contains silicon dioxide, goggles and silica filtering masks are recommended when handling large quantities. Tel: +90 312 223 5665. Calcium silicate has a high water absorption rate and a low bulk density. Perlite is a natural volcanic mineral composed of sodium potassium aluminum silicate. The most common oxidation states found in nature are +3, +5, and -3. Ferrite, a ceramic-like material with magnetic properties that are useful in many types of electronic devices. 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. 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). CAS Number . Cell Dimensions: a = 5.417, Z = 4; V = 158.96 Den (Calc)= 5.01. Substance name : PERLITE Product code : SIP6720.73 Formula : Na2OK2OAl2O3SiO2 Synonyms : SODIUM POTASSIUM ALUMINUM SILICATE Chemical family : INORGANIC SILICATE 1.2. 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. SECTION 4: FIRST AID MEASURES 4.1. Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3. EINECS Number . Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. CDC twenty four seven. 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. Formula: KAl 2 (AlSi 3 O 10)(OH) 2. Soluble in hot concentrated alkali and HF. Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. 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. 1-3, p. 467). 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. The popularity of perlite usage as a filter medium is growing considerably worldwide. 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]. 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. Other reported reserves are: Greece - 120 million tonnes, Turkey, USA and Hungary - about 49-57 million tonnes. [5][6]. seq. 93763-70-3 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. 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. 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. Fax: +90 312 223 5665. CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website. [4] Considering specific density of 1.1 ton/m3 confirmed reserves in Armenia amount to 136 million tons. 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. 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. 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. .1 Although much research has been performed on the chemical and structural composition, there is not yet complete agreement on the exact formula. 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. 12427-27-9 - Perlite - Searchable synonyms, formulas, resource links, and other chemical information. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. No: 69/4 06510 Yenimahalle - Ankara Turkey. 8-47, Table N4). 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. [12], Perlite is used in cosmetics as an absorbent and mechanical exfoliant. 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. 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. No: 69/4 06510 Yenimahalle - Ankara Turkey. [7] It may also be used to build composite materials that are sandwich-structured[8] or to create syntactic foam.[9]. 310-127-6: 100% WT . Perlite is a type of rhyolite with a chemical composition, index of refraction, and specific gravity similar to those of obsidian. X Ray Diffraction: By Intensity (I/I o ): 1.6332 (1), 2.709 (0.85), 2.423 (0.65), Forms: Mouse. The world reserves of perlite are estimated at 700 million tonnes. When used as an amendment, it has high permeability and low water retention and helps prevent soil compaction. Slightly soluble in dilute strong acids . The expanded material is a brilliant white, due to the reflectivity of the trapped bubbles. Calcium silicate is a key industrial chemical compound used in applications requiring high strength and durability. Potassium silicate is sometimes preferred for applications where heat insulation and fire resistance are the main objectives. Because of its low density and relatively low price (about US$50 per tonne of unexpanded perlite), many commercial applications for perlite have developed. 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. Fax: +90 312 223 5665. Perlite has the unusual characteristic of expanding and becoming porous when it is heated. Merhale Sok. [11], In horticulture, perlite can be used as a soil amendment or alone as a medium for hydroponics or for starting cuttings. Percentage (%) Expanded and/or Milled Perlite Ore . Perlite is an amorphous volcanic glass (SiO2) that has relatively high water content, typically formed by the hydration of obsidian. 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 Small quantities of perlite are also used in foundries, cryogenic insulation, and ceramics (as a clay additive). Centers for Disease Control and Prevention. 1-3, p. 467). 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. This page contains information on the chemical Perlite including: 5 synonyms/identifiers. Due to thermal and mechanical stability, non-toxicity, and high resistance against microbial attacks and organic solvents, perlite is widely used in biotechnological applications. CAS: None; Chemical Formula: None. You will be subject to the destination website's privacy policy when you follow the link. Skip to page content; Skip to site menu on this page. 93763-70-3 . Chemical Database Perlite … Published reports of adverse physiologic effects from exposure to perlite dust a form natural! Are not currently in force concludes that these limits protect workers from January! 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Perlite powder or granules, CAS # % TLV, mg/cu.m perlite Searchable.

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