The staff did not live to report the conditions. 0000007117 00000 n o Do not use … xref Perchloric acid extraction for NMR samples Last modified 07/15/10 5. Perchloric acid forms an azeotrope with water at a concentration of 72.5% perchloric acid. • Perform all operations on chemically resistant surfaces. 0000002363 00000 n Researchers using or anticipating using perchloric acid in their experiments should keep the following in mind: 1. 0000005774 00000 n Perchloric acid 1. Perchloric acid (HClO4) is a strong mineral acid. Anhydrous perchloric acid and solutions greater than 85% (w/w) present an explosion hazard. I believe it was written up in Metal Finishing at the time. Perchloric acid is a strong acid used for complete digestions of organic material. Add 1ml of 70% (v/v) perchloric acid with 250 umol maleate and 5 umol methylphosphonate. 0000055054 00000 n Aqueous perchloric acid can cause violent explosions if misused, or when used in concentrations greater than the normal commercial strength of 72%. Its preparation should be avoided. Anhydrous perchloric acid is highly unstable, explodes upon contact with organic material, and explodes spontaneously at room temperature after storage for a few days. 58 / Monday, March 26, 2012 / Rules and Regulations ... P241 - Use explosion-proof electrical, ventilating, lighting equipment P242 - Use only non-sparking tools. Perchloric acid can react violently at room temperature with cellulose materials (e.g., wood, paper), oxidizable organic materials (e.g., alcohols, ketones, and aldehydes), and strong basic materials, resulting in an increased risk of fire and/or explosion. If a bottle containing perchloric acid has turned dark and has crystals forming around the bottom of the bottle, there is a potential explosion hazard. 1.5) Extremely insensitive which do not have a mass explosion hazard (Div. 112 22 There have also been several reports of old wooden fume cupboards exploding after the use of perchloric acid. Protector Stainless Steel Perchloric Acid Fume Hoods are designed specifically for all procedures in the laboratory involving the use of perchloric acid. 0000001840 00000 n A 2.5 L bottle of 70% Perchloric Acid is 4.2 kg; always check the product’s Material Safety Data Sheet (MSDS). Zapoznaj się z przykładami tłumaczeń 'perchloric acid' w zdaniach, posłuchaj wymowy i przejrzyj gramatykę. Perchloric acid, though, 1.6) GHS criteria not met perchloric acid is extremely reactive with water and capable of explosive reactions when improperly handled. If playback doesn't begin shortly, try restarting your device. An explosion at a Nevada rocket fuel plant generates a massive, earthquake-like shockwave.Subscribe to Discovery! Product name : Perchloric Acid 60% CAS-No. Perchloric acid is an oxidizer; therefore, flooding quantities of water spray or fog should be used to fight fires involving perchloric acid. @�aP��t�h���8��J�kb�}�éV�Jܘ�*\R���;�KR�"����䝷gf��}v�o�RlXT?��ӻ�)t�?,mت�u��@��8�5����)�X�F��۶a��A?�ұa�X�?���&��>�>��Y���q�k�L&���U��q4$�C�FNО��s=�l���t�]��M_]�}���(���mٶ=�0s�o_�Z��М. It got entertaining when maintenance recalibrated the … Perchloric acid … On 20 February 1947, a large accidental explosion at the O'Connor Plating Works at 926 East Pico Boulevard in Los Angeles killed seventeen people and injured more than one hundred. If required for a task, anhydrous perchloric acid must be generated and used within one workshift. 0000002784 00000 n [1][2] Eleven nearby buildings were damaged beyond repair. • Always transfer perchloric acid over suitable containment in order to catch any spills and afford a ready means of cleanup and disposal. 0000055304 00000 n Perchloric acid + ethyl alcohol or methyl alcohol can cause explosion. 1.3) No significant hazard (Div. Dry perchloric acid crystals are unstable, and when subject to shock or vibration, can explode. When heated, Spills of perchloric acid at concentrations less than 72% (w/w) may evaporate to higher, more hazardous, concentrations. See: Trans. <<1620CAA10E81234AA35D11FF0AA22E6C>]>> Perchloric acid mist and vapor can condense in ventilation systems to form metallic perchlorates, which can be explosive. %%EOF He said the plant was using a new plating process for aluminum which employs concentrated perchloric acid. Perchloric acid fumes can also deposit into ducts over time and form explosive metallic perchlorates. Small scale preparation of Perchloric acid. 0000003007 00000 n This is justification for the use of a chemical fume hood. Perchloric acid must be stored away from organic chemicals, flammable or combustible materials and strong dehydrating agents such as sulfuric acid and anhydrous phosphorus pentoxide. 1.4) Very insensitive substances with mass explosion hazard (Div. On a smaller scale, Robinson reported a detonation of 3g of a perchlorate salt of a rhodium-polyamine complex undergoing an evaporation step in a rotary evaporator. Two days later, the station was licensed for commercial operation as KTLA-TV.[4]. This is justification for the use of a chemical fume hood. It blew out windows, bulged the exterior walls, lifted the roof, and extensively damaged equipment and supplies. 0000007342 00000 n It is a clear, colorless liquid with no odor. The perchloric acid explosion occurred in Los Angeles about 1953. From the standpoint of explosion safety, IER-NO3 in particular should be kept away from perchloric acid in the laboratory. Up Next. Perchloric acid can react violently at room temperature with cellulose materials (e.g., wood, paper), oxidizable organic materials (e.g., alcohols, ketones, and aldehydes), and strong basic materials, resulting in an increased risk of fire and/or explosion. Sulphuric acid is added to ensure dilution of the perchloric acid which can be explosive when heated’. US Patent No. Perchloric acid is not explosive in solution, only extremely corrosive and harmful to breathe. The acid is unstable if the concentration is over 72%; may explode by shock or concussion when dry or drying. Usually found as an aqueous solution, this colorless compound is a stronger acid than sulfuric acid and nitric acid. Perchloric acid is not explosive in solution, only extremely corrosive and harmful to breathe. Perchloric acid Perchloric acid can be produced by electrolysis or by a ion exchange mechanism using a resin. It is recommended that the interior fittings of a perchloric acid hood should be non-sparking and that the lights should be explosion proof. The city's worst explosion might have been caused by a breakdown in the plant refrigeration system only an hour earlier, Fire Prevention Chief EARL H. RICHARDSON, said. "EXPLOSION KILLS 15 IN LOS ANGELES, INJURES OVER 100; Destroys Electroplating Plant and Smashes Near-by Area With Thunderous Violence", "Five Negroes Killed in City's Worst Blast", "Deadly Blast a Proving Ground for Live TV", https://en.wikipedia.org/w/index.php?title=O%27Connor_Plating_Works_disaster&oldid=1002372580, Industrial fires and explosions in the United States, Los Angeles County, California articles missing geocoordinate data, Creative Commons Attribution-ShareAlike License, This page was last edited on 24 January 2021, at 03:09. Hot, concentrated solutions are extremely dangerous. ). Perchloric acid is a mineral acid with the formula HClO4. The uses of perchloric acid range from etching liquid crystal displays and oxide layers to digesting organic matter. Avoid contact with cellulose materials such as wood, paper and cotton, which could result in a fire or explosion. There are risks of fire and/or explosion should perchloric acid contact incompatible materials or perchloric acid vapors, released by the heating of perchloric acid, condense and crystallize on laboratory surfaces. Electrochem. ...aniline treated with perchloric acid, then formaldehyde, gives resinous condensation product which burns with explosive violence. The anhydrous (dehydrated) acid or solutions of >85% (w/w) present a serious explosion … • Eliminate or substitute for a less hazardous material when possible. Anhydrous perchloric acid is unstable at room temperatures and ultimately decomposes spontaneously with violent explosion. Eleven nearby buildings were damaged beyond repair. 6. Perchloric acid + most organic materials can cause explosion. o Use a safety shield to protect against a possible explosion that may result if perchloric acid contacts organic material. It reacts violently with combustible and reducing materials, organic materials and strong bases. Soc. Explosion: Hydrochloric Acid + Aluminum. 0000001211 00000 n You can help Wikipedia by expanding it. Perchloric acid is strong mineral acid, that has strong oxidizing and, under certain conditions, explosive properties. Solutions of <72% (w/w) of perchloric acid are normally stable. If you are planning on heating perchloric acid, contact EH&S. endstream endobj 132 0 obj <>/Size 112/Type/XRef>>stream A vessel of 130 gallons of the chemical was boiling and may have ignited when a plastic rack was lowered into it. Perchloric Acid. Drop of anhydrous perchloric acid on paper can cause violent explosion. 75, 271 - 78 (1939) for electrolysis method. o Use freshly prepared perchloric acid in quantities to be used up in the same day; at the end of the day neutralize any remaining acid. : 7601-90-3 1.2 Relevant identified uses of the substance or mixture and uses advised against Identified uses : Laboratory chemicals, Industrial & for professional use only. At room temperature, 73% or greater perchloric acid is a good oxidizer. Perchloric acid is a colorless, odorless, oily liquid that is extremely corrosive. Perchloric Acid Digestions: There have been several incidents where perchloric acid fumes and organic materials such as dust have interacted in fume cupboard ducts causing explosions. endstream endobj 113 0 obj <>/Outlines 12 0 R/Metadata 31 0 R/PieceInfo<>>>/Pages 30 0 R/PageLayout/OneColumn/StructTreeRoot 33 0 R/Type/Catalog/Lang(�� E N - U S)/LastModified(D:20100916113836)/PageLabels 28 0 R>> endobj 114 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>>/Type/Page>> endobj 115 0 obj <> endobj 116 0 obj <> endobj 117 0 obj <> endobj 118 0 obj <> endobj 119 0 obj <> endobj 120 0 obj <>stream If a bottle containing perchloric acid has turned dark and has crystals forming around the bottom of the bottle, there is a potential explosion hazard. Was licensed for commercial operation as KTLA-TV. [ 4 ] an azeotrope with wash-down! Nevada rocket fuel plant generates a massive, earthquake-like shockwave.Subscribe to Discovery reducing materials, such as,. 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