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Topic: CAS registry number

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	CAS FAQ Page
		CAS Registry Numbers (often referred to as CAS RNs or CAS Numbers) are unique identifiers for chemical substances.
		A CAS Registry Number itself has no inherent chemical significance but provides an unambiguous way to identify a chemical substance or molecular structure when there are many possible systematic, generic, proprietary, or trivial names.
		CAS Registry Numbers are used in many other public and private databases as well as chemical inventory listings and, of course, are included in all CAS-produced databases.
	www.cas.org /aboutcas/faq.html (974 words)

	CAS registry number - Wikipedia, the free encyclopedia
		CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys.
		A CAS registry number is separated by hyphens into three parts, the first consisting of up to 6 digits, the second consisting of two digits, and the third consisting of a single digit serving as a check digit.
		For example, the CAS number of water is 7732-18-5: the checksum is calculated as (8×1 + 1×2 + 2×3 + 3×4 + 7×5 + 7×6) = 105; 105 mod 10 = 5.
	en.wikipedia.org /wiki/CAS_registry_number (412 words)

	CAS registry number - CreationWiki, the encyclopedia of creation science
		CAS registry number of any chemical element, compound, polymer, alloy, or other chemical substance is its unique, nine-digit identifier assigned by the Chemical Abstract Service of the American Chemical Society.
		The CAS Registry has different numbers not only for different elements but also for different isotopes of the same element, and also for different isomers (including stereoisomers) of the same compound.
		For example, the CAS registry number for water is 7732-18-5.
	creationwiki.org /CAS_registry_number (333 words)

	Guidelines for the Notification and Testing of New Substances: Chemicals and Polymers
		To assist notifiers in their efforts to locate CAS registry numbers, sources that may be used to identify CAS registry numbers are described.
		CAS registry numbers for chemical substances can be identified by searching this File using molecular formulas, substructures, or a variety of chemical dictionary terms such as chemical names or name fragments (www.cas.org).
		CAS registry numbers have been included in the monographs for many of the CTFA Adopted Names and are included in a numerical listing in section VIII of this dictionary (www.ctfa.org/).
	www.ec.gc.ca /substances/nsb/cpguide/eng/app6_e.html (1786 words)

	[No title] (Site not responding. Last check: )
		A non-CA name, a generic chemical name, a chemical synonym, a CAS Registry Number, a trade name, or the PMN, Exemption, or Bona Fide Intent notice number/ User Fee number/ TSCA Accession number of another notice is written in the chemical name obox of the notice form in place of the currently correct CA name.
		The specific chemical name and corresponding CAS Registry Number (if such a number exists) for (1) each monomer or other precursor substance used to make a reported Class 2 substance, is not included in Part I, section B of the notice.
		For example, if a correct CA name had to be submitted in a PMN because the notice was received at EPA on or after May 30, 1995, an amendment submission reporting a change in the chemical identity must contain a correctly revised CA name for the substance.
	www.pinechemicals.org /pmn/EPAGuidance.doc (1030 words)

	CAS REGISTRY and CAS Registry Numbers
		The CAS REGISTRY is the largest and most current database of chemical substance information in the world, containing more than 32 million organic and inorganic substances and 59 million sequences.
		Numbers are assigned in sequential order to unique, new substances identified by CAS scientists for inclusion in the database.
		CAS is the source and final authority for CAS Registry Numbers.
	www.cas.org /expertise/cascontent/registry/regsys.html (503 words)

	ASU Noble Library - Ten Easy Tips for Finding Property Data
		A CAS registry number is assigned to each specific chemical compound that appears in the chemical literature or as requested by chemical manufacturers to comply with regulatory procedures.
		CAS has a formula to determine if a registry number is plausible, see: Check Digit Verification of CAS Registry Numbers at http://www.cas.org/EO/checkdig.html.
		Because a number is easier and less time consuming to search in an index than a long list of variant names or a complex chemical name, use CAS registry numbers to search more efficiently.
	www.asu.edu /lib/noble/chem/prophelp.htm (2714 words)

	Science IP - CAS Information Use Policies
		CAS is committed to the global advancement of science through the dissemination of scientific information to promote research performed by individuals and teams of scientists.
		CAS is aware of the changing needs of researchers who rely on scientific information to perform their daily tasks.
		CAS does not permit the building of Databases that have wide and general availability and no longer fulfill the purpose of individual or team research that CAS permits but instead serve as a substitute for the use of CAS Databases.
	www.scienceip.org /data_use_restrictions.html (2160 words)

	Welcome to the Annie Merner Pfeiffer Library -- Disciplines -- (Site not responding. Last check: )
		CAS Registry Numbers are often used to produce accurate search results in other Chemical Abstracts files.
		The Registry File will indicate if records referring to the substance are available in other CAS files.
		If you have used a reference work to identify a CAS number, you can search Chemical Abstracts by that number without using the Registry file.
	www.wvwc.edu /lib/chem-stnregistry.htm (585 words)

	EPA/OPPT/High Production Volume Challenge Program (HPV) Guidance on Searching for Chemical Information and Data
		CAS Registry Numbers are preferred because they were created specifically to function as unique identifiers to help eliminate the confusion caused by the variety of synonyms that could be used for the same chemical.
		Searching by CAS Registry Numbers for individual chemical substances enables one to specifically identify a substance without needing to know the particular synonym an author or database publisher may have used for the chemical.
		If a database indexes studies by CAS Registry Number there will be less need to do a search by synonym, but a sponsor may want to try a variety of synonyms just to be on the safe side.
	www.epa.gov /oppt/chemrtk/pubs/general/locstudi.htm (1820 words)

	Guidance on Searching for Chemical Information; EPA/OPPT/High Production Volume (HPV) Challenge Program
		CAS Registry Numbers were specifically created to uniquely identify chemical substances and have been used since 1965 by the Chemical Abstracts Service (a division of the American Chemical Society).
		Registry Numbers are often used to identify chemical substances in journal articles, handbooks, indexes, databases, and inventories.
		HPV Challenge sponsors are required to provide the CAS Registry Numbers for their chemicals as part of the HPV Challenge commitment.
	www.epa.gov /opptintr/chemrtk/pubs/general/casnum.htm (457 words)

	Help on Searching
		If the number of documents and hits found is too high, refine your search or use the AND operator to narrow your search.
		Searching for a chemical using the CAS Registry Number makes your search more precise than using the chemical name.
		The CAS Registry Number is an unique identifier for each chemical substance.
	www.ilocis.org /en/help.html (793 words)

	Chemistry: WebElements Periodic Table : Periodic properties : CAS Registry number: Definition
		The last digit is a check-digit to which helps to ensure that any given CAS number is authentic.
		The way to check whether the CAS number is authentic is as follows.
		The last digit of the CAS registry number matches the units digit in the number 60, so the number is legal.
	www.webelements.com /webelements/properties/text/definitions/cas.html (306 words)

	ACS CINF: CAS Registry Numbers on STN: Searching with a Registry Number
		Displaying a Registry Number record does not guarantee that it truly is the correct Registry Number for your substance.
		The Registry Number of the alternate structure appears in the AR display field.
		The preferred Registry Number displays in the PR display field of the substance record of the alternate structure.
	www-sul.stanford.edu /depts/swain/hosted/cinf/casreg/snumber.html (1108 words)

	STN on the Web Description (Help)
		CAS Registry Numbers are displayed as hypertext links in STN records.
		Automatically, the REGISTRY file is entered and the substance identification data, including the structure diagram, for that CAS Registry Number is displayed in the session screen.
		The system transfers the CAS Registry Numbers from the most recent BLAST search, and provides a message that the Registry Number Transfer is complete.
	stnweb.cas.org /html/english/help_app.html (4741 words)

	Registry Numbers
		CAS Registry Numbers are extremely useful when searching for information about a specific chemical substance.
		Registry numbers are very useful shortcuts, but they are not perfect.
		See the CAS Registry System to learn more about Registry Numbers and their importance.
	www.lib.utexas.edu /chem/info/rn.html (323 words)

	C472 Lecture: Chemical Name, Formula, Registry Number Searching
		The Registry Number appears in the indexing of CA File records in preference to the formal name of the compound.
		The Registry Number is found in many databases and increasingly as an index to printed reference works.
		Likewise, in searching the CAS Registry File with tools such as STN Express or STN on the Web, you must ascertain the proper order of the name segments before a compound can be found in the chemical name field (/CN) if formal chemical name searching is done.
	www.indiana.edu /~cheminfo/C472/472nameformula.html (2094 words)

	Chem 400 CAS Registry Numbers
		CAS Registry Numbers (CAS RN) are identifying numbers assigned by the Chemical Abstracts Service to specific chemical substances.
		The "official" source of CAS Registry Numbers is the Registry Handbook.
		When you find a Registry Number for a substance, you should check it against this volume to be certain that you are using a valid number.
	www.libraries.psu.edu /instruction/chem400/ccmodules/cas.htm (646 words)

	The MSDS HyperGlossary: CAS Number
		A CAS (Chemical Abstracts Service) Registry Number is a unique identifier that tells you, for example, that acetone and dimethyl ketone are actually the same substance.
		The numbers you see on trucks on the highway are not CAS Numbers, but U.S. Department of Transportation (DOT) mandated UN/NA codes which are not necessarily specific to each chemical.
		Filing chemicals by CAS number is one way to avoid the problem of finding an MSDS by name ("did I file that under dichloromethane or methylene chloride??").
	www.ilpi.com /msds/ref/cas.html (525 words)

	Penn State Libraries : PAMS Library : Chemistry : CAS Registry
		CAS Registry Numbers (CAS RN) are very useful in that they provide a way to uniquely identify a chemical substance.
		These numbers are assigned sequentially to the chemical substances when they are entered into the CAS Chemical Registry System.
		The public form of the CAS Chemical Registry System is known as the CAS Registry file, and you access it via SciFinder Scholar when you do a structure or CAS Registry Number search.
	www.libraries.psu.edu /pams/chemistry/cas.html (261 words)

	[No title]
		Once the Registry number for each compound is obtained, it is appended to the RTECS record for that compound and is also used to retrieve from the CAS Registry (Dittmar et al.) all known synonyms for the compound, its molecular weight and molecular formula, and its connection table (a computer-readable version of its structural formula).
		The CAS Registry Number, on the other hand, is a widely used identifier, which can be learned from a variety of sources, such as the CIS Structure and Nomenclature Search System.
		When either the CAS Registry Number or the NIOSH accession number is provided to the search system, the entire entry corresponding to the given number is provided to the user.
	www.hellers.com /steve/resume/p48.html (3428 words)

	Chemical Literature Course, Lecture 14
		The CA Index name is the standard name under which the compound would be found in the current Chemical Substances Index.
		Deleted Registry Numbers (if any) are numbers which were formerly assigned to this compound, but which have been consolidated under the current number.
		Brief records list each company, when the record was last updated, the name and order number that company uses for the compound, synonyms which it recognizes and the CAS Registry number.
	www.library.ucsb.edu /classes/chem184/184lecm.html (2599 words)

	Advanced Chemistry Development/Partners: Chemical Abstracts Service (CAS)
		Chemical Abstracts Service (CAS) is extending the reach and content of its databases, already recognized as the world's most comprehensive for chemistry-related research and substance information.
		CAS is adding eight calculated property values to several million substance records in the CAS Registry: number of hydrogen donors, number of hydrogen acceptors, number of rotatable bonds, molecular weight, logD, logP, pK
		These calculated properties are provided using CAS substance connection tables and software developed by ACD/Labs and will enable researchers to quickly and easily focus on the more "drug-like" molecules identified in the Registry file.
	www.acdlabs.com /partners/cas.html (408 words)

	About ChemFinder.Com: Glossary
		The ACX Number is a unique identifier and registry number for substances in ChemACX, ChemFinder.Com, and submitted via Open Chemistry.
		ACX Numbers can also be extended to point to physical material, and may contain information relating to the vendor, quality, and package size.
		CAS Registry Numbers are assigned to every uniquely-identifiable substance, so 'cis-2-hexene', 'trans-2-hexene', and '2-hexene' (a mixture with unspecified cis/trans composition) are all assigned separate CAS Numbers.
	chemfinder.cambridgesoft.com /about/chemfinder/glossary.asp (727 words)

	Chemical Abstracts Service
		CAS Exceeds All Previous Records for Input to Databases - 08/07
		CAS, the global leader in chemical information, and a division of the American Chemical Society, provides the most comprehensive databases of publicly disclosed research in chemistry and related sciences, including the world's largest collection of substance information, the CAS REGISTRY
		Chemical Abstracts Service (CAS), a division of the American Chemical Society, celebrates its 100th year of providing access to chemical literature and patents to speed and enable scientific discovery to improve people's lives.
	www.cas.org (199 words)

	Lesson 7: Substance Searching Using CAS Registry Numbers
		CA and LCA records contain CAS Registry Numbers for all the substances that have been indexed by CAS from a particular document.
		If you already have the CAS Registry Number, search it in the Basic Index of the CA file and you obtain all the references in which this particular substance was indexed.
		Several examples of how to find CAS Registry Numbers in the Registry File will be shown to illustrate the basic techniques that can be used, depending on what type of information you have about the substance.
	elib.tu-darmstadt.de /digibib/kurs/ACAD/lesson7.html (1559 words)

	Cline Library - Help Topic Detailed Information
		CAS Registry numbers can be found for many substances in the CRC Handbook of Chemistry and Physics, the Merck Index, the Dictionary of Organic Compounds and others.
		If the CAS Registry number is not available,enter the chemical name in the CAS Number search or enter the chemical name or molecular formula using the Chemical Substances category.
		The record will provide a registry number for the substance and a link to chemical references regarding the compound.
	www6.nau.edu /library/info/recdisplayhelp.cfm?resource_id=2016 (294 words)

	InfoDome - CHEMINFO, Registry Numbers
		RN (registry number) is the CAS number assigned to each chemical substance.
		Use of the registry number makes it possible to search and retrieve information from several files at the same time.
		Provides registry numbers for some of the substances discussed at the end of the articles.
	infodome.sdsu.edu /research/guides/cheminfo/registry-numbers.shtml (349 words)

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