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

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