This database contains the most recent revision from the Government Printing Office (GPO) of the Code of Federal Regulations (CFR) Title 21 - Food and Drugs. You can search CFR Title 21 by entering a part and section number, selecting a CFR part number from a drop down list, or by using a full text search.

http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfrsearch.cfm