Chapter 5:Sources of Chemical Information, Toxicity Data and Assessment of Their Quality

This chapter identifies a range of sources that provide toxicity data that may be of use in category formation and read­across. Data in this context relate to both the chemical identity and characteristics of molecules in addition to biological (toxicological) information. Different methods of representing chemicals are given and caveats associated with the use of certain representations are also indicated. A glossary of key terms relating to assessment of data quality is provided along with guidance on methods to perform data quality assessment.