chemical handbooks in the electronic age -...
TRANSCRIPT
Chemical Handbooks in the Electronic Age
Assuring data quality
David Lide
Some Early Chemical Handbooks
• 1881 – Beilstein Handbook of Organic Chemistry
• 1883 – Landolt‐Börnstein Tables
• 1887 – Gmelin Handbook of Inorganic Chemistry
• 1889 – Merck Index
• 1909 – Houben‐Weyl Methods of Organic Chemistry
• 1913 – CRC Handbook of Chemistry and Physics • 1934 – Chapman & Hall DicOonary of Organic Compounds
DicOonary of Organic Compounds
Some Handbooks from CRC Press
Handbook of Chemistry and Physics Handbook of Biochemistry and Molecular Biology, 2nd EdiOon Handbook of Chromatography The Biodiesel Handbook Handbook of Toxicology Handbook of PesOcides Handbook of AnOoxidants PracOcal Handbook of Spectroscopy Handbook of Industrial Biocatalysis Handbook of Detergents Handbook of Medicinal Mints
Early Chemical Handbooks that Have Been Converted to Electronic Media
Beilstein Handbook of Organic Chemistry → CrossFire Beilstein
Landolt‐Börnstein Tables → SpringerMaterials (January 2010) Gmelin Handbook of Inorganic Chemistry → CrossFire Gmelin
Merck Index → Merck Index Online ‐(Dialog) Houben‐Weyl Methods of Organic Chemistry → Science of
Synthesis (Thieme)
CRC Handbook of Chemistry and Physics → CHEMnetBASE/CRC Handbook of Chemistry and Physics
Chapman & Hall DicOonary of Organic Compounds → CHEMnetBASE/Combined Chemical DicOonaries
Sites Resul8ng from Google Searches for Chemical Proper8es
• Wikipedia, WebAnswers, etc. – user‐edited sites • Commercial vendor sites, including catalogs, MSDS • Academic sites – maintained by professors or students; also
archives of faculty publicaOons • Miscellaneous blogs • Primary journals – most require subscripOon for access • Government agency, professional organizaOons (NIST, NASA,
IUPAC, etc.)
General characterisOc of the first four types of web sites: • Usually no references • UncertainOes rarely given
Google Searches for Physical and Chemical Proper8es Atomic weight of molybdenum – 71,000 hits
1 site of the first 11 gives the current IUPAC value, with uncertainty
6 sites give older values (one from a 1913 book)
4 sites are journals that are not accessible
Mel8ng point of calcium oxide – 115,000 hits
1 site of first 11 gives the best available value (2927 °C) – EconomicExpert.com
7 sites give a value around 2572 °C
3 sites give no value
Surface tension of acetone at 20 °C – 156,000 hits
1 site gives 23.7 mN/m (Wikipedia) – CRC Handbook value is 23.34
1 site gives 25.20
6 sites are journals that are not accessible
2 sites are blogs about adding acetone to gasoline
1 site quotes values of 23.30, 23.29, and 22.776 from the primary literature
From Wikipedia: Chemical infobox
Reliability of data These tables are constructed by experts in the field of chemical sciences, as well as amateurs and may have been edited by less‐ knowledgeable passers‐by or vandals. Although these tables are well designed, and useful to present the relevant chemical data, the accuracy of informaOon they contain cannot be guaranteed. This also applies to the informaOon in the Hazards secOon, which is provided for reference value only. When handling chemicals, always take the proper precauOons as defined also by reliable sources of informaOon, parOcularly Material safety data sheets supplied by the manufacturer and/or relevant government agency. Also see Wikipedia: General disclaimer.
Thermal Conduc8vity of Copper
Solubility of Pentane in Water