Ebenfalls findet es Anwendung beim Verzinnen, Verzinken oder Löten, da es die Fähigkeit besitzt, mit Metalloxiden leicht rauchende und schwach anhaftende Chloride zu bilden und somit die Metalloberfläche zu reinigen. Since conditions of use That covers up any coloration the fossil may have, and if lighted at an angle highly enhances contrast in photographic documentation of three-dimensional specimens. It works as a flux by cleaning the surface of workpieces by reacting with the metal oxides at the surface to form a volatile metal chloride. Many of these compounds catalyze organic reactions. Contact lenses should not be worn when working with this chemical. Canada residents can call a provincial poison control center. ) Ammonium chloride was then transported along the Silk Road eastwards to China and westwards to the Muslim lands and Europe. The locations of the sources of ammonium chloride in the burning coal deposits of Central Asia are shown on the following map: Ammonium chloride was later harvested from other volcanoes: The Arabs harvested it from, The term for "ammonium chloride" in Arabic is, "Solubility Products of Selected Compounds", National Institute for Occupational Safety and Health, "A New Frigorifick Experiment Shewing, How a Considerable Degree of Cold May be Suddenly Produced without the Help of Snow, Ice, Haile, Wind, or Niter, and That at Any Time of the Year", "New techniques for coating paleontological specimens prior to photography", "(S)-1,1-Diphenylprolinol Trimethylsilyl Ether", "Note sur le Sel ammoniaque que produit une mine de houille incendiée", "Ueber den innern Zusammenhang der pseudovulkanischen Erscheinungen Islands", "Observations sur la nature et la composition du sel ammoniac", "Adressé à l'Académie sur le sel ammoniac, etc. Information last revised July 2016. All rights reserved. Wässrige Lösungen reagieren leicht sauer der pH-Wert einer 1%igen Lösung beträgt etwa 5,5. It is soluble in water(37%). Ammonium chloride is an inorganic compound with the formula NH4Cl and a white crystalline salt that is highly soluble in water. Much is made of sal ammoniac, the reactive powers of which seem to have given Western alchemy a new lease on life.  At that time, ammonium chloride came from two sources: (1) the vents of underground coal fires in Central Asia, specifically, in the Tian Shan mountains (which extend from Xinjiang province of northwestern China through Kyrgyzstan) as well as in the Alay (or Alai) mountains of southwestern Kyrgyzstan, and (2) the fumaroles of the volcano Mount Taftan in southeastern Iran. In many cases, these chemicals are present. breakthrough time; permeation rates typically increase with Ammonium chloride is a white crystalline solid. All chemicals have Ammonium chloride reacts with a strong base, like sodium hydroxide, to release ammonia gas: Similarly, ammonium chloride also reacts with alkali metal carbonates at elevated temperatures, giving ammonia and alkali metal chloride: A 5% by weight solution of ammonium chloride in water has a pH in the range 4.6 to 6.0.. determine the level of toxicity and the proper personal protective Ammonium chloride is a colourless crystalline substance. September 2020 um 09:49 Uhr bearbeitet. Its purpose was to provide a chlorine donor to enhance the green and blue colours from copper ions in the flame. Copyright(c) 2016 First Databank, Inc. Ammoniumchlorid ist das Ammoniumsalz der Salzsäure. Properly discard this product when it is expired or no longer needed. The mineral is commonly formed on burning coal dumps from condensation of coal-derived gases. rates than the fabric. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment. Where do you typically shop for over-the-counter wellness products? Do not flush medications down the toilet or pour them into a drain unless instructed to do so. , In paleontology, ammonium chloride vapor is deposited on fossils, where the substance forms a brilliant white, easily removed and fairly harmless and inert layer of tiny crystals. In Deutschland ist der Zusatz von Ammoniumchlorid zu Schnupf- und Kautabak laut Tabakverordnung erlaubt. Ammonium salts are an irritant to the gastric mucosa and may induce nausea and vomiting. Ammonium chloride is yielded as a by-product in the ammonia-soda process for making sodium carbonate. Ammoniumchlorid ist schlecht in Ethanol löslich und unlöslich in Aceton und Ether. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. © 2005 - 2019 WebMD LLC. Our editors will review what you’ve submitted and determine whether to revise the article.