Search results
Results from the WOW.Com Content Network
Carl Auer von Welsbach used a mixture of lanthanum oxide and zirconium oxide, which he called Actinophor and patented in 1886. The original mantles gave a green-tinted light and were not very successful, and his first company, which established a factory in Atzgersdorf in 1887, failed in 1889. [53] Modern uses of lanthanum include: LaB 6 hot ...
Lanthanum(III) oxide, also known as lanthana, chemical formula La 2 O 3, is an inorganic compound containing the rare earth element lanthanum and oxygen. It is used in some ferroelectric materials, as a component of optical materials, and is a feedstock for certain catalysts, among other uses.
Lanthanum carbonate is used in medicine as a phosphate binder. [1] As a medication it is sold under the trade name Fosrenol by the pharmaceutical company Shire Pharmaceuticals . Due to its large size (1000 mg tablet is 2.2 cm in diameter), it may be possible to choke on the tablet if it is not chewed.
Lanthanum stearate is a metal-organic compound, a salt of lanthanum and stearic acid with the chemical formula La(C 18 H 35 O 2) 3. [ 1 ] [ 2 ] The compound is classified as a metallic soap , i.e. a metal derivative of a fatty acid .
Reaction of soluble lanthanum nitrate with an excess of oxalic acid: 2 La(NO 3) 3 + 3 (COOH) 2 → La 2 (C 2 O 4) 3 + 6 HNO 3. Also, a reaction of lanthanum chloride with oxalic acid: 2 LaCl 3 + 3 H 2 C 2 O 4 → La 2 (C 2 O 4) 3 + 6 HCl
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. [6] In organic synthesis, lanthanum trichloride functions as a mild Lewis acid for converting aldehydes to acetals. [7]
When the study participants used a hot styling tool that reached 210 degrees Celsius/410 degrees Fahrenheit, the chemical emissions from the hair care products increased anywhere from 50% to 310%.
Lanthanum nitride can be prepared from the reaction of nitrogen and lanthanum trihydride: 2LaH 3 + N 2 → 2LaN + 3H 2. It can also be prepared from the reaction of ammonia and lanthanum trihydride: [3] LaH 3 + NH 3 → LaN + 3H 2. The reaction of nitrogen and lanthanum amalgam can also work: [4] 2La + N 2 → 2LaN