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The International Chemical Identifier (InChI, pronounced / ˈɪntʃiː / IN-chee) [3] is a textual identifier for chemical substances, designed to provide a standard way to encode molecular information and to facilitate the search for such information in databases and on the web. Initially developed by the International Union of Pure and ...
"[for his] discovery of the inert gaseous elements in air, and his determination of their place in the periodic system" [21] 1905 Adolf von Baeyer (1835–1917) Germany "[for] the advancement of organic chemistry and the chemical industry, through his work on organic dyes and hydroaromatic compounds" [22] 1906 Henri Moissan (1852–1907) France
Gas chromatography–mass spectrometry (GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. [1] Applications of GC–MS include drug detection, fire investigation, environmental analysis, explosives investigation, food and flavor analysis ...
Liquid chromatography–mass spectrometry. Liquid chromatography–mass spectrometry (LC–MS) is an analytical chemistry technique that combines the physical separation capabilities of liquid chromatography (or HPLC) with the mass analysis capabilities of mass spectrometry (MS). Coupled chromatography – MS systems are popular in chemical ...
M N−1. In chemistry, the molar mass (M) (sometimes called molecular weight or formula weight, but see related quantities for usage) of a chemical compound is defined as the ratio between the mass and the amount of substance (measured in moles) of any sample of the compound. [1] The molar mass is a bulk, not molecular, property of a substance.
The tandem mass spectrometry data on over 930,000 molecular standards (as of January 2024) [33] [36] is provided to facilitate the identification of chemical entities from tandem mass spectrometry experiments. [37] In addition to the identification of known molecules it is also useful for identifying unknowns using its similarity searching ...
Identification of the ring or chain with the most senior elements (In order: N, P, Si, B, O, S, C). Identification of the parent compound. Rings are senior to chains if composed of the same elements. For cyclic systems: Identification of the parent cyclic ring. The cyclic system must obey these rules, in order of precedence:
Screenshot of the CAS Common Chemistry database with information about caffeine ().. A CAS Registry Number [1] (also referred to as CAS RN [2] or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in the CAS Registry.