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Lanthanum Oxalate
Lanthanum oxalate is an inorganic compound, a salt of lanthanum metal and oxalic acid with the chemical formula . __TOC__ Synthesis Reaction of soluble lanthanum nitrate with an excess of oxalic acid: : Also, a reaction of lanthanum chloride with oxalic acid Oxalic acid is an organic acid with the systematic name ethanedioic acid and chemical formula , also written as or or . It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name i ...: : Physical properties Lanthanum(III) oxalate forms colorless crystals that are poorly soluble in water. The compound forms various crystallohydrates •n, where n = 1, 2, 3, 7, and 10. The crystallohydrates decompose when heated. References {{Oxalates Inorganic compounds Oxalates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerium(III) Oxalate
Cerium(III) oxalate (cerous oxalate) is the Inorganic compound, inorganic cerium Salt (chemistry), salt of oxalic acid. It is a white crystalline solid with the chemical formula of Ce2(C2O4)3. It can be obtained by the reaction of oxalic acid with cerium(III) chloride. Uses Cerium(III) oxalate is used as an antiemetic. It has been identified as part of the invisible ink that was used by Stasi operatives during the Cold War. Toxicity Cerium(III) oxalate irritation, irritates human skin, skin and mucous membranes, and is a strong irritant to human eye, eyes. If it gets into the eyes, there is a danger of severe eye injury. Cerium salts increase the blood coagulation rate, and exposure to cerium salts can cause sensitivity to heat. Oxalates are corrosive to tissue and are powerful irritants. They have a caustic effect on the linings of the digestive tracts and can cause kidney damage. References {{Oxalates Cerium(III) compounds Oxalates Antiemetics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inorganic Compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''. Inorganic compounds comprise most of the Earth's crust, although the compositions of the deep Mantle (geology), mantle remain active areas of investigation. All allotropes (structurally different pure forms of an element) and some simple carbon compounds are often considered inorganic. Examples include the allotropes of carbon (graphite, diamond, buckminsterfullerene, graphene, etc.), carbon monoxide , carbon dioxide , carbides, and salt (chemistry), salts of inorganic anions such as carbonates, cyanides, cyanates, thiocyanates, isothiocyanates, etc. Many of these are normal parts of mostly organic systems, including organisms; describing a chemical as inorganic does not necessarily mean that it cannot occur within life, living things. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigma Aldrich
Sigma-Aldrich (formally MilliporeSigma) is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate Merck Group. Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. It grew through various acquisitions until it had over 9,600 employees and was listed on the Fortune 1000. The company has two United States headquarters, in St. Louis and Burlington, MA and has operations in approximately 40 countries. In 2015, the multinational chemical conglomerate Merck Group acquired Sigma-Aldrich for $17 billion. The company is currently a part of Merck's life science business and in combination with Merck's earlier acquired Millipore Corporation, Millipore, operates as MilliporeSigma. It is headquartered in Burlington, Massachusetts, United States. History Sigma Chemical Company of St. Louis and Aldrich Chemical Company of Milwaukee were both American specialty chemical companies when they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of The American Chemical Society
The ''Journal of the American Chemical Society'' (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society. The journal has absorbed two other publications in its history, the ''Journal of Analytical and Applied Chemistry'' (July 1893) and the ''American Chemical Journal'' (January 1914). It covers all fields of chemistry. Since 2021, the editor-in-chief is Erick M. Carreira (ETH Zurich). In 2014, the journal moved to a hybrid open access publishing model. Abstracting and indexing The journal is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2023 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 14.4. Editors-in-chief The following people are or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanthanum Chloride
Lanthanum chloride is the inorganic compound with the formula La Cl3. It is a common salt of lanthanum which is mainly used in research. It is a white solid that is highly soluble in water and alcohols. Preparation Anhydrous lanthanum(III) chloride can be produced by the ammonium chloride route. In the first step, lanthanum oxide is heated with ammonium chloride to produce the ammonium salt of the pentachloride: :La2O3 + 10NH4Cl → 2(NH4)2LaCl5 + 6H2O + 6NH3 In the second step, the ammonium chloride salt is converted to the trichlorides by heating in a vacuum at 350-400 °C: :(NH4)2LaCl5 → LaCl3 + 2HCl + 2NH3 Uses Lanthanum chloride is also used in biochemical research to block the activity of divalent cation channels, mainly calcium channels. Doped with cerium, it is used as a scintillator material. In organic synthesis, lanthanum trichloride functions as a mild Lewis acid for converting aldehydes to acetals. The compound has been identified as a catalys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanthanum Nitrate
Lanthanum(III) nitrate is any inorganic compound with the chemical formula . It is used in the extraction and purification of lanthanum from its ores. The compound decomposes at 499°C to lanthanum oxide, nitric oxide and oxygen. Preparation Lanthanum nitrate is prepared by reacting lanthanum oxide with nitric acid which creates lanthanum(III) nitrate and water Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv .... : References {{inorganic-compound-stub Lanthanum compounds Nitrates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Institute Of Standards And Technology
The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into Outline of physical science, physical science laboratory programs that include Nanotechnology, nanoscale science and technology, engineering, information technology, neutron research, material measurement, and physical measurement. From 1901 to 1988, the agency was named the National Bureau of Standards. History Background The Articles of Confederation, ratified by the colonies in 1781, provided: The United States in Congress assembled shall also have the sole and exclusive right and power of regulating the alloy and value of coin struck by their own authority, or by that of the respective states—fixing the standards of weights and measures throughout the United States. Article 1, section 8, of the Constitution of the United States, ratified i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Inorganic And Nuclear Chemistry
''Polyhedron'' is a peer-reviewed scientific journal covering the field of inorganic chemistry. It was established in 1955 as the ''Journal of Inorganic and Nuclear Chemistry'' and is published by Elsevier. Abstracting and indexing ''Polyhedron'' is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 3.052. References External links * {{Official Website, http://www.journals.elsevier.com/polyhedron/ Inorganic chemistry journals Elsevier academic journals Academic journals established in 1955 English-language journals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxalic Acid
Oxalic acid is an organic acid with the systematic name ethanedioic acid and chemical formula , also written as or or . It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name is derived from early investigators who isolated oxalic acid from flowering plants of the genus '' Oxalis'', commonly known as wood-sorrels. It occurs naturally in many foods. Excessive ingestion of oxalic acid or prolonged skin contact can be dangerous. Oxalic acid is a much stronger acid than acetic acid. It is a reducing agent and its conjugate bases hydrogen oxalate () and oxalate () are chelating agents for metal cations. It is used as a cleaning agent, especially for the removal of rust, because it forms a water-soluble ferric iron complex, the ferrioxalate ion. Oxalic acid typically occurs as the dihydrate with the formula . History The preparation of salts of oxalic acid from plants had been known since at least 1745, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanthanum
Lanthanum is a chemical element; it has symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Lanthanum is traditionally counted among the rare earth elements. Like most other rare earth elements, its usual oxidation state is +3, although some compounds are known with an oxidation state of +2. Lanthanum has no biological role in humans but is used by some bacteria. It is not particularly toxic to humans but does show some antimicrobial activity. Lanthanum usually occurs together with cerium and the other rare earth elements. Lanthanum was first found by the Swedish chemist Carl Gustaf Mosander in 1839 as an impurity in cerium nitrate – hence the name ''lanthanum'', from the ancient Greek (), meaning 'to lie hidden'. Although ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ytterbium(III) Oxalate
Ytterbium(III) oxalate is the oxalate of ytterbium, with the chemical formula Yb2(C2O4)3. Preparation Ytterbium(III) oxalate hydrate can be prepared by reacting an aqueous solution of ytterbium(III) chloride and a benzene solution of dimethyl oxalate Dimethyl oxalate is an organic compound with the formula or . It is the dimethyl ester of oxalic acid. Dimethyl oxalate is a colorless or white solid that is soluble in water. Production Dimethyl oxalate can be obtained by esterification of oxa .... Properties Ytterbium(III) oxalate pentahydrate is decomposed by heat to obtain the dihydrate, which is further heated to obtain ytterbium(III) oxide. It reacts with acids to obtain H b(C2O4)26H2O.Moebius, R.; Matthes, F. The exchange of oxalate ions for chloride ions of the oxalate hydrates of the rare earths and yttrium. ''Zeitschrift fuer Chemie'', 1964. 4 (6): 234-235. ISSN: 0044-2402. References {{Oxalates Ytterbium(III) compounds Oxalates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europium(III) Oxalate
Europium(III) oxalate (Eu2(C2O4)3) is a chemical compound of europium and oxalic acid. There are different hydrates including the decahydrate, hexahydrate and tetrahydrate. Europium(II) oxalate is also known. Preparation An excess of oxalate is added to a hot solution of Eu3+ cations. The resulting precipitate of Eu2(C2O4)3 ⋅ 10H2O is dried in a desiccator. Properties Europium(III) oxide (Eu2O3) can be prepared by calcining europium(III) oxalate. The dehydration of Eu2(C2O4)3 · 10H2O occurs below 200 °C: : The decomposition of this compound takes place in two stages, the first at 350 °C and the second at about 620 °C. : In the Mössbauer spectrum, Eu2(C2O4)3 · 10H2O shows an isomer shift of +0,26 mm/s with a line width of 2,38 mm/s, in reference to EuF3. The Debye temperature of Eu2(C2O4)3 is 166±15 K. Eu2(C2O4)3 · 10H2O crystallizes monoclinically in the space group of ''P21/c'' (space g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
