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CAS registry number
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CAS Registry Numbers[1]
are unique numericalidentifiersassigned by theChemical
Abstracts Serviceto every chemical described in the open
scientific literature (currently
including those described from at least 1957 through the
present) and includingelements,
isotopes,organicandinorganiccompounds,ions,organometallics,metals,
nonstructurable
materials (aka 'UVCB's- i.e., materials of Unknown, Variable
Composition, or Biological
origin).[2]
They are also referred to as CAS RNs, CAS Numbers, etc.
Contents
1 Use 2 Format 3 Standardization of Complexity 4 Ownership 5 CAS
number search engine 6 Trivia 7 See also 8 Notes 9 External
links
Use
The Registry maintained by CAS is an authoritative collection of
disclosed chemical
substance information. Currently the CAS Registry identifies
more than 67 million organic
and inorganic substances and 63 million protein and DNA
sequences, plus additional
information about each substance; and the Registry is updated
with an approximate 12,000
additional new substances daily.[3]
Historically, chemicals have been identified by a wide variety
of synonyms. Frequently these
are arcane and constructed according to regional naming
conventions relating to chemical
formulae, structures or origins. Well-known chemicals may
additionally be known viamultiple generic, historical, commercial,
and/or black-market names.
For example, Hoffman's "-Lysergsure-Diethylamid", indexed by the
CAS under the name
"Ergoline-8-carboxamide, 9,10-didehydro-N,N-diethyl-6-methyl-,
(8)"-
and also known from the Merck Manual synthesis by names such as
"9,10-Didehydro-N,N-
diethyl-6-methylergoline-8-carboxamide"- -
became most conveniently and discretely known asLSD-25during
initial pharmaceutical
investigations.
But then during Sandoz' international promotion of the drug, it
was subsequently labeled
"Delysid" in the west. After 1963 Delysid attracted many
additional, more colorful marketing
http://en.wikipedia.org/wiki/CAS_registry_number#mw-headhttp://en.wikipedia.org/wiki/CAS_registry_number#mw-headhttp://en.wikipedia.org/wiki/CAS_registry_number#mw-headhttp://en.wikipedia.org/wiki/CAS_registry_number#p-searchhttp://en.wikipedia.org/wiki/CAS_registry_number#p-searchhttp://en.wikipedia.org/wiki/CAS_registry_number#p-searchhttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-0http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-0http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-0http://en.wikipedia.org/wiki/Identifierhttp://en.wikipedia.org/wiki/Identifierhttp://en.wikipedia.org/wiki/Identifierhttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_elementhttp://en.wikipedia.org/wiki/Chemical_elementhttp://en.wikipedia.org/wiki/Chemical_elementhttp://en.wikipedia.org/wiki/Isotopeshttp://en.wikipedia.org/wiki/Isotopeshttp://en.wikipedia.org/wiki/Organic_compoundshttp://en.wikipedia.org/wiki/Organic_compoundshttp://en.wikipedia.org/wiki/Organic_compoundshttp://en.wikipedia.org/wiki/Inorganic_compoundshttp://en.wikipedia.org/wiki/Inorganic_compoundshttp://en.wikipedia.org/wiki/Inorganic_compoundshttp://en.wikipedia.org/wiki/Ionhttp://en.wikipedia.org/wiki/Ionhttp://en.wikipedia.org/wiki/Ionhttp://en.wikipedia.org/wiki/Organometallic_chemistryhttp://en.wikipedia.org/wiki/Organometallic_chemistryhttp://en.wikipedia.org/wiki/Organometallic_chemistryhttp://en.wikipedia.org/wiki/Metalshttp://en.wikipedia.org/wiki/Metalshttp://en.wikipedia.org/wiki/Metalshttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-crc-1http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-crc-1http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-crc-1http://en.wikipedia.org/wiki/CAS_registry_number#Usehttp://en.wikipedia.org/wiki/CAS_registry_number#Usehttp://en.wikipedia.org/wiki/CAS_registry_number#Formathttp://en.wikipedia.org/wiki/CAS_registry_number#Formathttp://en.wikipedia.org/wiki/CAS_registry_number#Standardization_of_Complexityhttp://en.wikipedia.org/wiki/CAS_registry_number#Standardization_of_Complexityhttp://en.wikipedia.org/wiki/CAS_registry_number#Ownershiphttp://en.wikipedia.org/wiki/CAS_registry_number#Ownershiphttp://en.wikipedia.org/wiki/CAS_registry_number#CAS_number_search_enginehttp://en.wikipedia.org/wiki/CAS_registry_number#CAS_number_search_enginehttp://en.wikipedia.org/wiki/CAS_registry_number#Triviahttp://en.wikipedia.org/wiki/CAS_registry_number#Triviahttp://en.wikipedia.org/wiki/CAS_registry_number#See_alsohttp://en.wikipedia.org/wiki/CAS_registry_number#See_alsohttp://en.wikipedia.org/wiki/CAS_registry_number#Noteshttp://en.wikipedia.org/wiki/CAS_registry_number#Noteshttp://en.wikipedia.org/wiki/CAS_registry_number#External_linkshttp://en.wikipedia.org/wiki/CAS_registry_number#External_linkshttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-2http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-2http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-2http://en.wikipedia.org/wiki/LSD-25http://en.wikipedia.org/wiki/LSD-25http://en.wikipedia.org/wiki/LSD-25http://en.wikipedia.org/wiki/LSD-25http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-2http://en.wikipedia.org/wiki/CAS_registry_number#External_linkshttp://en.wikipedia.org/wiki/CAS_registry_number#Noteshttp://en.wikipedia.org/wiki/CAS_registry_number#See_alsohttp://en.wikipedia.org/wiki/CAS_registry_number#Triviahttp://en.wikipedia.org/wiki/CAS_registry_number#CAS_number_search_enginehttp://en.wikipedia.org/wiki/CAS_registry_number#Ownershiphttp://en.wikipedia.org/wiki/CAS_registry_number#Standardization_of_Complexityhttp://en.wikipedia.org/wiki/CAS_registry_number#Formathttp://en.wikipedia.org/wiki/CAS_registry_number#Usehttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-crc-1http://en.wikipedia.org/wiki/Metalshttp://en.wikipedia.org/wiki/Organometallic_chemistryhttp://en.wikipedia.org/wiki/Ionhttp://en.wikipedia.org/wiki/Inorganic_compoundshttp://en.wikipedia.org/wiki/Organic_compoundshttp://en.wikipedia.org/wiki/Isotopeshttp://en.wikipedia.org/wiki/Chemical_elementhttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Identifierhttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-0http://en.wikipedia.org/wiki/CAS_registry_number#p-searchhttp://en.wikipedia.org/wiki/CAS_registry_number#mw-head
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names, initially confusing law enforcement and lay persons.
Since 1989 LSD is again labeled
for western research uses, currently available under another,
historic trade name: "Lysergide".
On the other hand, CAS Numbers are not related to chemistry, are
unrelated to any previous
systems, and do not readily form phonetic analogs or synonyms.
The numbers are simple and
regular, convenient for database searches.They offer a reliable,
common and international link to every specific substance across
the
various nomenclatures and disciplines used by branches of
science, industry, and regulatory
bodies. Almost all molecule databases today allow searching by
CAS Registry Number.
Format
A CAS Number has no inherent meaning but is assigned in
sequential, increasing order when
the substance is identified by CAS scientists for inclusion in
the CAS REGISTRY database.
A CAS Registry Number is separated by hyphens into three parts,
the first consisting of up to7 digits, the second consisting of two
digits, and the third consisting of a single digit serving
as acheck digit. The check digit is found by taking the last
digit times 1, the previous digit
times 2, the previous digit times 3 etc., adding all these up
and computing the summodulo
10. For example, the CAS number ofwateris 7732-18-5: the
checksum 5 is calculated as
(81 + 12 + 23 + 34 + 75 + 76) = 105; 105 mod 10 = 5.
Standardization of Complexity
Isomersof a molecule are assigned discrete CAS numbers:
D-glucosehas 50-99-7, L-
glucosehas 921-60-8, -D-glucosehas 26655-34-5, etc.
Occasionally whole classes of molecules receive a single CAS
number: the group of
enzymes known asalcohol dehydrogenaseshas 9031-72-5.
A standard mixture of otherwise-identified compounds may receive
a corporate CAS
number; One example ismustard oil(8007-40-7).
Ownership
The assigning agency,Chemical Abstracts Service (CAS)is a
function of theAmerican
Chemical Society (ACS); CAS information is copyrighted by the
ACS. Users wishing to
incorporate CAS Numbers into databases should refer to CAS
policy:
A User or Organization may include, without a license and
without paying a fee, up to 10,000
CAS Registry Numbers or CASRNs in a catalog, web site, or other
product for which there is
no charge. The following attribution should be referenced or
appear with the use of each
CASRN: CAS Registry Number is a Registered Trademark of the
American ChemicalSociety.
[4]
CAS number search engine
CHEMINDEX Search viaCanadian Centre for Occupational Health and
Safety[5] ChemIDplus Advanced viaUnited States National Library of
Medicine[6] Common Chemistry TM[7]viaAustralian Inventory of
Chemical Substances[8]
http://en.wikipedia.org/wiki/Check_digithttp://en.wikipedia.org/wiki/Check_digithttp://en.wikipedia.org/wiki/Check_digithttp://en.wikipedia.org/wiki/Modular_arithmetichttp://en.wikipedia.org/wiki/Modular_arithmetichttp://en.wikipedia.org/wiki/Modular_arithmetichttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Isomershttp://en.wikipedia.org/wiki/Isomershttp://en.wikipedia.org/wiki/Isomershttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Alcohol_dehydrogenasehttp://en.wikipedia.org/wiki/Alcohol_dehydrogenasehttp://en.wikipedia.org/wiki/Alcohol_dehydrogenasehttp://en.wikipedia.org/wiki/Mustard_oilhttp://en.wikipedia.org/wiki/Mustard_oilhttp://en.wikipedia.org/wiki/Mustard_oilhttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-3http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-3http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-3http://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-ss-6http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-ss-6http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Australian_Inventory_of_Chemical_Substances&action=edit&redlink=1http://en.wikipedia.org/wiki/CAS_registry_number#cite_note-ss-6http://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/United_States_National_Library_of_Medicinehttp://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/Canadian_Centre_for_Occupational_Health_and_Safetyhttp://en.wikipedia.org/wiki/CAS_registry_number#cite_note-3http://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/American_Chemical_Societyhttp://en.wikipedia.org/wiki/Chemical_Abstracts_Servicehttp://en.wikipedia.org/wiki/Mustard_oilhttp://en.wikipedia.org/wiki/Alcohol_dehydrogenasehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Glucosehttp://en.wikipedia.org/wiki/Isomershttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Modular_arithmetichttp://en.wikipedia.org/wiki/Check_digit
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