title: Finding toxicological information: An approach for occupational health professionals.
abstract: BACKGROUND
  It can be difficult for occupational health professionals to assess which toxicological databases available on the Internet are the most useful for answering their questions. Therefore we evaluated toxicological databases for their ability to answer practical questions about exposure and prevention. We also propose recommended practices for searching for toxicological properties of chemicals.
  
  
  METHODS
  We used a systematic search to find databases available on the Internet. Our criteria for the databases were the following: has a search engine, includes factual information on toxic and hazardous chemicals harmful for human health, and is free of charge. We developed both a qualitative and a quantitative rating method, which was used by four independent assessors to determine appropriateness, the quality of content, and ease of use of the database. Final ratings were based on a consensus of at least two evaluators.
  
  
  RESULTS
  Out of 822 results we found 21 databases that met our inclusion criteria. Out of these 21 databases 14 are administered in the US, five in Europe, one in Australia, and one in Canada. Nine are administered by a governmental organization. No database achieved the maximum score of 27. The databases GESTIS, ESIS, Hazardous Substances Data Bank, TOXNET and NIOSH Pocket Guide to Chemical Hazards all scored more than 20 points. The following approach was developed for occupational health professionals searching for the toxicological properties of chemicals: start with the identity of the chemical; then search for health hazards, exposure route and measurement; next the limit values; and finally look for the preventive measures.
  
  
  CONCLUSIONS
  A rating system of toxicological databases to assess their value for occupational health professionals discriminated well between databases in terms of their appropriateness, quality of information, and ease of use. Several American and European databases yielded high scores and provide a valuable source for occupational health professionals.
authors.affiliation: Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, 00250, Helsinki, Finland. irja.laamanen@ttl.fi.
authors.forename: Irja
authors.initials: I
authors.lastname: Laamanen
authors.forename: Jos
authors.initials: J
authors.lastname: Verbeek
authors.forename: Giuliano
authors.initials: G
authors.lastname: Franco
authors.forename: Marika
authors.initials: M
authors.lastname: Lehtola
authors.forename: Marita
authors.initials: M
authors.lastname: Luotamo