Chemical Abstracts File

An introduction to using the Chemical Abstracts System can be found in the tutorial in Section 5.5. 

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There is growing commercial importance and escalating scientific interest in PVDF. The World Patent database, including the United States, Hsts 678 patents that cite the term poly(vinyHdene fluoride) for the period 1963—1980 and 2052 patents for the period 1981—1992 Chemical Abstracts files covering the years 1967—1992 contain 5282 references for the same term. Thirty years ago there was only one commercial producer of PVDF in the world now there are two in the United States, two in Japan, and three in Europe. 

The arrow refers to an abstract which is shown in Sect. 7.3 Fig. 118 illustrates the abstract of the printed Chemical Abstracts, Fig. 117 shows the relevant information from the Chemical Abstracts File. 

Beilstein is a factual file, unlike Chemical Abstracts. There is only one entry for every compound, containing a multitude of sources. Every record is divided into many fields, which are individually searchable. In the Chemical Abstracts file, every single record reflects one single citation. This difference is the reason for the very different pricing structure in the Beilstein file. There is not only a fee for connect time and search terms (Sect. 6.2) but also for field display. Thus a warning is given from the start, to rethink before entering the display command ALL. It may cost more than one hundred US (Sect. 7.10.4). The recorded facts are ... 

Typical bibliographic databases are the CA File of Chemical Abstracts Service CAS) or Medline of the US National Library of Medicine. Most electronic journals provide articles as full-text files, e.g., the Journal of the American Chemical Society ( ACS). 

The Chemical Abstracts (CA) File is the main abstracting and indexing service for biochemistry, chemistry, and chemical engineering. 

CAS/STlS[Interna.tiona.1. CAS/STN offers stmcture searchable files such as Registry, Beilstein, MARPAT, CASREACT, and Gmelin a variety of learning files, eg, LRegistry, LBeHstein, LMARPAT, and LCASREACT and software products such as STN Express for on-line stmcture and substmcture searching. Chemical Abstracts Service, a division of the American Chemical Society, has pubHshed Chemical Abstracts since 1907 and joindy operates STN International with EIZ Kadsmhe and the Japan Information Center of Science and Technology. 

MARPAT, produced by Chemical Abstracts Service, coataias the geaeric stmcture records for pateat pubHcatioas siace 1988, which are iacluded ia the CA file. Sources iaclude pateats from 26 couatries plus EPO and PCT pubHcations. BibHographic records for retrieved references can be direcdy accessed ia this database (101). 

Personal communication. Chemical Abstracts Structure Tile and Dictiona File Printoutfor Nickel Compounds, Washiagton, D.C., Oct. 6, 1993. 

CA File, CAPlus, CA Previews STN Chemical Abstracts Service international, chemistry limited bibhographic data comprehensive English language abstracts deep indexing of chemical concepts stmcture-searchable compound registry chemical stmcture drawings... 

The world wide facilities for retrieving chemical information provided by the Chemical Abstract Service (CAS on-line) have made it a relatively easy matter to obtain CAS registry numbers of substances, and most of the numbers in this monograph were obtained via CAS on-line. We should point out that two other available useful files are CSCHEM and CSCORP which provide, respectively, information on chemicals (and chemical products) and addresses and telephone numbers of the main branch offices of chemical suppliers. 

Since the second edition OFTHE Chemistry of Organic Fluorine Compounds Milos Hudhcky continued screening Chemical Abstracts to keep up with fluorine chem istry Some 15 000-20,000 clippings accumulated in the file cabinets in his office After his retirement, he was almost at the verge of discarding this voluminous material when it occurred to him that it could be used as a first-tier literature search for updating the book... 

Chemical Abstract Service. 2000. Chemical Abstract Service Registry File Data Bank. December,... 

Fluorine thermochemistry itself has not been previously reviewed, but has tended to be included in more general reviews and reports, or in data compilations (141,123,151). The most comprehensive literature survey, covering the years 1949-1961 (9), supplements the N.B.S Circular and Notes (203). (N.B.S. Technical Notes 270-3 to 270-7 issued from 1969-1973 were unfortunately published without literature references.) Subsequent work was conveniently traced from annual issues of the Bulletin of Chemical Thermodynamics, and from 1977 to 1979 (May) by accessing the Chemical Abstracts data files. Experimental aspects of fluorine thermochemistry are included in two rather dated volumes (214), and only general detail will be given in this review. 

The 8(b) inventory accumulation was the next major activity. For a decentralized company like Monsanto or, for that matter, most major chemical companies, the experience of centralized information gathering was a new experience. However, we believe that the experience not only was novel, but proved to be beneficial from several points of view. First of all, it enabled us to evolve a network of expertise. Second it gave us a central data-base on which to build other information important from a corporate point of view, and permit a one-time expense for developing a system. Third, it revealed that we needed to improve our data files in some areas. And, fourth, it gave our central staff departments some surprises as to substance locations. We used the Chemical Abstract Service Registry Profile capabilities to gather all the known synonyms and added our internal numeric and common identifiers to access the file via dozens of possible names or numbers. 

CAS. 1988. Chemical Abstract Services Online Registry File. Decembers, 1988. 

Figure 16.1 illustrates the process we recommend for obtaining chemical property data [5]. Assessors usually start with a chemical name or synonym, Chemical Abstracts Service (CAS) Registry Number, and/or the chemical structure. The first task is to confirm the identification and structure of the chemical of interest. The largest (over 30 million chemicals) and most authoritative, but a relatively expensive source of chemical identification information is the Chemical Registry file of the American Chemical Society. However, there are several... 

Fisanick, W., L. D. Mitchell, J. A. Scott, and G. G. Vander Stouw, "Substructure Searching of Computer-Readable Chemical Abstracts Service Ninth Collective Index Nomenclature Files," Journal of Chemical Information and Computer Sciences, lj>(2), 73-84 (1975). 

Reactions. CASREACr File is a chemical reaction database containing over 118.500 records with rcacliun informalion derived from documents covered in the Organic Section of Chemical Abstracts. The tile is available from STN. 

The sharp rise in the number of papers and patent applications is evident on inspection of the citations in Chemical Abstracts. For the period from 1967, when C. A. started their online file, until 1989, a nearly exponential trend in publications is obvious (see Table I). For comparison, the ten-year period from 1957 to 1966 contains only about 80 relevant C. A. references, which is an average of eight per year. 

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