why do some chemicals have multiple chemical abstracts

  • why do some chemicals have multiple chemical abstracts

    Why do some chemicals have multiple Chemical Abstracts

    Why do some chemicals have multiple Chemical Abstracts Service (CAS) numbers? Some chemical names refer to Family names rather than exact formulas, especially if the molecule was made out of a

  • cas registry and cas registry number faqs | cas

    CAS REGISTRY and CAS Registry Number FAQs | CAS

    CAS indexes these substances to support registration policies, chemical libraries, chemical catalogs, web sources, reaction databases and data collections not represented in STN. To learn more about a substance in REGISTRY that does not have any literature or patent references consult the Source of Registration (SR) and Class Identifier (CI

  • cas registry number

    CAS Registry Number

    A CAS Registry Number, also referred to as CASRN or CAS Number, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the open scientific literature (currently including all substances described from 1957 through the present, plus some substances from the early or mid 1900s), including organic and inorganic compounds

  • chemical abstracts service - national historic chemical

    Chemical Abstracts Service - National Historic Chemical

    In 1907, Chemical Abstracts utilized 129 volunteer chemists; by the mid-1960s the number of volunteers reached more than 3,200. Crane referred to some of the volunteers as "the iron men of CA [Chemical Abstracts]," and many served for decades, with thirteen volunteers abstracting for more than 50 years. Over the years the abstractors took on an

  • corrosionpedia - what is the chemical abstracts service (cas

    Corrosionpedia - What is the Chemical Abstracts Service (CAS

    Chemical Abstracts provides summaries and indexes of disclosures in recently published scientific documents. This abstracts service ceased print publication on January 1, 2010. CAS Registry Numbers are assigned by the Chemical Abstracts Service and are used to identify specific chemicals or mixtures. The CAS Number is used in various databases

  • chemical abstracts. (journal, magazine, 1907) [worldcat.org]

    Chemical abstracts. (Journal, magazine, 1907) [WorldCat.org]

    Chemical abstracts (OCoLC)794857667: Document Type: Journal / Magazine / Newspaper: All Authors / Contributors: American Chemical Society. Chemical Abstracts Service. ISSN: 0009-2258: OCLC Number: 1553947: Notes: "A publication of the Chemical Abstracts Service." Description: 103 volumes: Other Titles: Chemical abstracts Chem abstracts

  • how to use material safety data sheets (msds)

    How to Use Material Safety Data Sheets (MSDS)

    The molecular formula may be used to locate a chemical of known composition. You can usually search for substance using its CAS (Chemical Abstracts Service) registry number. Different chemicals may have the same name, but each will have its own CAS number. Sometimes the easiest way to locate a product is to search by manufacturer.

  • exploring consumer exposure pathways and patterns of use

    Exploring consumer exposure pathways and patterns of use

    A limited number of chemicals that are known to have biological targets, and with uses that suggest high exposures such as pharmaceuticals and some food use pesticides, have been well characterized on both the hazard and exposure axes. For the remaining majority of marketed chemicals, there is little publicly available information , . This

  • chemical hazard communication

    Chemical Hazard Communication

    Chemical exposure may cause or contribute to many serious health effects such as heart ailments, central nervous system, kidney and lung damage, sterility, cancer, burns, and rashes. Some chemicals may also be safety hazards and have the potential to cause fires and explosions and other serious accidents.

  • chemical information sources/chemical name and formula

    Chemical Information Sources/Chemical Name and Formula

    Chemical Abstracts’ (CA) chemical nomenclature has changed over time since 1907. Thus, substances may have several CA Index Names, as well as synonyms used in the literature and in commerce. Until late 2006, major changes were made only at the beginning of each collective index period.

  • a new semi-automated workflow for chemical data retrieval

    A new semi-automated workflow for chemical data retrieval

    With the advent of high-throughput technologies, increasing numbers of chemical data have been made available to the scientific community [].Consequently, more and more web-based data services and tools have emerged, that provide a way to store and constantly update information on thousands of different chemical structures.

  • chemical information sources/chemical safety searches

    Chemical Information Sources/Chemical Safety Searches

    All too often we see news stories of chemical industry practices that have had negative effects on health or the environment or hear reports of serious accidents or spills involving chemicals. An item in Chemical & Engineering News (December 8, 1997, p. 17) reported on "Hanford tanks leaking to groundwater."