Top Document: Sci.chem FAQ - Part 2 of 7 Previous Document: 8. Laboratory and Chemical Safety Information on the Internet Next Document: 10. Traditional Laboratory and Chemical Safety Information Sources See reader questions & answers on this topic! - Help others by sharing your knowledge 9.1 When can I find Chemical Abstracts? Chemical Abstracts is produced by the ACS and is available either in hardcopy or CD-ROM form in most institution libraries that have a chemistry department. It is expensive, and is also available commercially from several online database suppliers ( refer to Section 7.1 ). It is not legally available free over the Internet. Some libraries have accidentally enabled limited search access for anonymous users, but this is usually soon curtailed, so enjoy them while you can :-). If your school does not have access, the librarian should be able to ascertain the nearest library that holds the hardcopy CA and also permits public access. CA volumes are not available for interloan. All chemicals are given an arbitrary Registry Number as they are encountered by the Chemical Abstracts Service ( Section 12.1 ). Many information sources now also use the CAS RN to overcome potential nomenclature confusion. 9.2 Where can I obtain chemical patent information? Most governments have a patent office, and there are usually branches in main centres. If you are able to obtain access to the patents at the patent office, and are familiar with patent codes, or know the patent number, the cost will be lower than using a patent attorney. If you do not know how to search for patents, and your time is valuable, you will find that using a patent attorney will be very cost effective. An excellent guide to the general concepts of patents and what you can expect to find, along with the advantages and disadvantages, is " What Every Engineer Should Know About Patents" [1]. 9.3 Where can I purchase chemicals? The chemicals usually found in home chemistry sets can usually be purchased at the shop where the set was obtained, or the local hardware shop or pharmacist, provided the chemical is not subject to government or state restrictions. Many chemicals are only available to approved purchasers. If the chemical is used for a hobby, then it is very likely the FAQ for that Usenet group ( eg rec.pyrotechnics ), will contain information on suppliers. Most national chemical societies publish an annual listing of suppliers with their journals. Standard trade directories ( eg Chem Sources [2,3] and OPD Chemical Buyers Directory [4] ) list companies who specialise in chemicals, however few will be interested in small purchases. Smaller specialist and boutique suppliers are usually more likely to sell small quantities of chemicals to individuals. Most larger suppliers of high purity laboratory and industrial chemicals ( eg Aldrich-Sigma [5], J.T.Baker [6] ) will only sell a limited range of chemicals to individuals , and usually do not provide any discounts for individuals - unless they have an account with the company. I'm not sure about the US, but here in NZ discounts can halve the price of most chemicals. If you are intending to acquire a wide range of chemicals over time, an account may be a good idea, however remember that you may then be subject to inspection visits by regulators if you purchase certain chemicals. Most government and corporate organisations and laboratories also have policies of not supplying unknown individuals with *any* chemical. Some chemical suppliers are also accessible via the Internet ( refer Section 7.10 ) 9.4 Where can I purchase laboratory equipment? As with chemicals, simple laboratory equipment can be purchased from the suppliers of home chemistry sets. Some government and state authorities require certain equipment ( eg stills ) to be registered, especially if it can be used to produce illegal substances. Most larger suppliers may require an account, but often specialist supplies can be purchased from hobby shops such as home brew kit suppliers. Once again the FAQ of relevant newsgroups ( such as alt.drugs and rec.pyrotechnics ) may provide the names of suppliers, as can trade directories and the Yellow Pages. Cole Palmer and Fisher offer free comprehensive catalogues that identify what is available. Some equipment suppliers are accessible via the Internet ( refer Section 7.11 ). 9.5 What reference texts should I search first? If you require basic physical information about a chemical then many chemical suppliers catalogues also include common properties - such as boiling point, melting point, density, and flash point. Aldrich, Merck, and Lancaster provide information on organic chemicals, and Sigma covers biochemicals. Chemical catalogues also often provide cross references to the Chemical Abstracts Registry Numbers, the Merck Index, spectral libraries, safety, and preparation information. The actual product purity may limit the accuracy of the data, and more accurate information could be available in the Rubber Handbook or Merck Index. As catalogues are usually free on request ( Aldrich catalogue is also available on disk as a searchable database for $25 ), they are an excellent initial information source that will often direct you to appropriate reference texts. You may be able to acquire an older edition by asking your chemistry teacher or chemical storeroom supervisor. Depending on the type of chemical information required, some specialist reference texts may be required, but there are several texts that are common to most fields of chemistry. These are usually found in the reference section of most public and technical libraries and, because they are often heavily discounted for students, many chemists have copies of several of them. If your library does not have them, ask some of your teachers for access to their personal copy. Many of these texts are now also available on CD-ROM, usually at a slightly lower cost than the hardcopy, however the Merck Index is an exception where the CD-ROM version costs significantly more than the hardcopy. The Merck Index is an excellent starting point for information on organic chemicals used in the agricultural, biochemical, chemical, and pharmaceutical industries. It is usually available, along with the Rubber Handbook, in the reference section of libraries. Don't expect a $7,000 encyclopedia set like Kirk Othmer to be freely available over the Internet, or available on CD-ROM for $100 :-). I have also marked those that are commercially available through online services with an asterisk. For more detailed aspects of individual compounds, common texts include:- CRC Handbook of Chemistry & Physics ( aka Rubber Handbook ) [7] - tabulations of diverse chemical and physical properties. - start here for physical data with minimal description. The Merck Index * [8] - brief monographs on most common organic chemicals, especially those used in the chemical, biochemical, and pharmaceutical industries. - excellent source for physical and physiological properties, common names, and CAS RN. - monographs point to more descriptive sources. - available on CD-ROM, but the hardcopy version is much cheaper. Lange's Handbook of Chemistry [9] - tabulations of chemical properties. Hawley's Condensed Chemical Dictionary [10] - very brief monographs on a wide range of common industrial chemicals. - very good starting point to ascertain physical properties of both inorganic and organic chemicals used in commerce. - Available on CD-ROM Tables of Physical and Chemical Constants ( aka Kaye and Laby ) [11] - tabulations of constants, often not in the Rubber Handbook The Chemical Technicians' Ready Reference Handbook [12] - tabulations of various common chemicals and materials. The Matheson Gas Data Book [13] - tabulations of properties of a diverse range of gases There are several good general "science" texts that provide basic coverage of aspects of chemistry, eg the concise version of the McGraw Hill Encyclopedia of Science and Technology [14] or Van Nostrand's Scientific Encyclopedia [15]. There are also several single volume chemistry books that provide brief monographs covering diverse aspects of chemistry, such as the McGraw Hill Encyclopedia of Chemistry [16]. These texts are often found in the reference sections of general libraries. The next source is usually the encyclopedia sets that are also found in the reference section of general libraries. There are some general ones that cover all fields of science, and often have annual updates. An example is the 20 volume McGraw Hill Encyclopedia of Science and Technology, available in hardcopy or CD-ROM versions [17]. For more detailed, but still with general coverage, there are at least two popular large multi-volume chemistry encyclopedias. One, or both, of these is usually found in the reference sections of technical and large public libraries. These have become the standard first point of reference for information on properties, production, and applications of industrial chemicals. Kirk Othmer Encyclopedia of Chemical Technology - 4th edition * [18] - excellent 27 volume set - extensive monographs on chemical families and processes. - start here if you wish to obtain up-to-date, easy-to-read, comprehensive technical information on an amazingly diverse range of chemistry. ( available in hardcopy ($324/volume, around $7,000/set), online, on CD-ROM, and as a greatly-abridged concise volume (3rd Edition = $110) Ullmann's Encyclopedia of Industrial Chemistry - 5th edition [19] - excellent translation from the original German edition. - extensive monographs on common industrial processes - the style is different to Kirk Othmer in that information is not so well integrated into the monograph, but often contains more hard information and good reviews of specific topics. ( In 1997 the fifth edition was made available on CD-ROM, with the sixth edition was started in 1998, with each CD holding the equivalent of three printed volumes. The full book/CD-ROM sixth edition will cost around $14,000 ) There are also the very large multi-volume sets of specialised chemical information that are mainly only found in institutions that have a strong chemistry or chemical engineering component, such as: Beilstein * [20] - provides detailed monographs of most organic chemicals, covering preparation, properties and structure. Gmelin [21] - provides detailed information on most elements and inorganic chemicals Heilbron * [22] - provides short monographs of many organic compounds, mainly listing properties and references to preparations. An excellent way to quickly find information on chemicals. McKetta - Encyclopedia of Chemical Processing and Design [23] - extensive monographs containing technical data on chemical processes. Encyclopedia of Polymer Science and Engineering - 2nd edition * [24] ( available in hardcopy, online, and in a greatly-abridged concise volume ) - detailed monographs on common polymers and processes Thorpe's Dictionary of Applied Chemistry [25] - getting old, but *still* contains lots of excellent information on the properties and industrial applications of chemicals - is very useful for historical information on how a product developed. For more specialised references, refer to the appropriate section of this FAQ, however I will list a few texts covering general laboratory techniques not mentioned elsewhere. If your local bookshop does not carry specialist technical books, many are also available from appropriate chemical and equipment suppliers, such as Aldrich-Sigma and Supelco. Vacuum = High Vacuum Techniques for Chemical Syntheses and Measurements [26]. = High Vacuum Techniques [27] Pipework = Swagelok Tube Fitting and Installation Manual [28] Thermocouples = Thermocouples: Theory and Practice [29] ( The Omega catalogues are also a good source of practical information on a wide range of temperature, flow and pressure sensors ) Many of the laboratory safety texts also include sections on design and management of laboratories. 9.6 Where can I find physical and spectral properties of chemicals? Some chemical suppliers catalogues ( eg Aldrich [5] ), also include common properties such as boiling point, melting point, density, flash point. Most will provide a catalogue free on request, but it is often easier to obtain an obsolete edition from your institution, as they usually just throw them out. The most information is often in catalogues from international laboratory chemical suppliers ( eg J.T.Baker [6], Merck [30], Rhone-Poulenc [31] ), and specialist organic chemical suppliers ( eg Aldrich [5], Sigma [32], Janssen [33], Lancaster [34] ), however it should be remembered that the product purity will affect the value reported, and that more accurate values may be available in references such as the Merck Index or Rubber Handbook. Once you have checked the catalogues, and checked the standard texts above, then more specialised compilations should be checked. For spectral properties, there are several large compilations of detailed spectral properties, including infra-red [35-37], NMR [38-40], and mass-spec [41,42]. These are usually located near the instruments, rather than in the library, however the NIST IR and mass spectral libraries are accessible via the WWW ( refer Section 7.2 ). Most transportation safety compilations and MSDS also list common physical properties, as do the most of the encyclopedia sets ( refer Section 9.5 ). More specialised information is usually found in specialist books or journals, such as the Journal of Chemical and Engineering Data. 9.7 Where can I find production data for commercial chemicals Both Kirk Othmer and Ullmann tabulate production data, and identify major manufacturers, and more recent information is found in monographs in CMR. C&EN also tabulates production data for the major industrial chemicals and publishes an annual listing of the top 50 chemicals. Lists of manufacturers of chemicals are found in compilations such as Chemical Sources [2,3] and trade directories. There are also industry organisations such as the Chemical Manufacturers Association that maintain records of production. Specialist industry journals usually provide annual surveys of production and capacity. Government departments ( often the Dept. of "Trade & Industry" or "Commerce" ) also compile national production statistics. 9.8 Where can I find the composition of a proprietary chemical? If it has been patented, the composition will be detailed in the patent, and any local patent agent should be able to locate and obtain a copy. Transportation regulations usually require manufacturers to list components, consequently examination of the MSDS often provides an indication of major components, some of which are likely to just be the solvent. There are also compilations of chemical tradenames that may also indicate what the major components in a proprietary chemical. Hawley, Gardner, Industrial Chemical Thesaurus [43], Encyclopedia of Industrial Chemical Additives [44], and the Chemical Tradenames Dictionary [45] are good starting points. In some countries only the "active" or "toxic" ingredients have to be disclosed, consequently chemical analysis would have to be undertaken. Another technique is to look for equivalent formulations - to ascertain what ingredients are typically used, and the multi-volume Chemical Formulary [46] is one of the best sources if you can not justify a patent search. 9.9 Where can I find out about the history of Chemistry? There is a soc.history.science Usenet group that is very knowledgeable and active, and includes individual events in the history of chemistry. There are usually several overview books on the history of chemistry in most school and public libraries, and example is "The History of Chemistry" by J.Hudson [47]. There are also several outstanding biographies of famous chemists, and many chemical societies and chemical firms have commissioned books on specific aspects of chemistry history. The Journal of Chemical Education often has articles on specific historical aspects of chemistry. 9.10 Where can I find out about the discovery of an element? The Rubber Handbook has a monograph on each element, including a brief discussion of the discovery. "Chemistry of the Elements" by Greenwood and Earnshaw [48], and "The Elements" by Emsley [49], also provide good discussions, and Gmelin provides a fairly comprehensive discussion of discovery of each element. In each of the above, the discovery of each element is taken in isolation. The best general overview that provides a cohesive framework explaining the overall progression of discoveries, is "Discovery of the Elements" by Weeks [50], and it should be available in most libraries. For the more recent elements, there usually are brief reports and discussions in C&EN and the Journal of Chemical Education. 9.11 What inspirational books about chemistry should I read? Do they exist :-)?. You could try "The Chemical Bond: Structure and Dynamics" edited by A.Zewail [51]. It contains articles by several Nobel Laureates. If you want to be entertained, and only have time for a short read, try the "Chemistry in the Next Century" [52] article in Industrial and Engineering Chemistry written in May 1935 by Thomas Midgley, Jr.. He was responsible for the discovery and development of CFCs and alkyl lead octane enhancers for gasoline - two chemical developments that became so pervasive and useful that their use resulted in unintentional environmental pollution. For a brief story about their discovery, try "Midgley - Saint or Serpent" [53] in Chemtech. It confirms that old saying " Luck is when preparation meets opportunity ". User Contributions:Top Document: Sci.chem FAQ - Part 2 of 7 Previous Document: 8. Laboratory and Chemical Safety Information on the Internet Next Document: 10. Traditional Laboratory and Chemical Safety Information Sources Part1 - Part2 - Part3 - Part4 - Part5 - Part6 - Part7 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: B.Hamilton@irl.cri.nz
Last Update March 27 2014 @ 02:12 PM
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