Special Focus

1) EMBASE via Elsevier 
A major biomedical and pharmacological database which gives you access to the most up-to-date information about medical and drug-related subjects. It provides comprehensive coverage of drug research, pharmacology, pharmaceutics, pharmacy and toxicology, clinical medicine, public health, occupational health, environmental health rehabilitation and physical therapy, basic biological research relevant to human medicine, alternative medicine; and much more.

2) Pesticide Chemical Search (USEPA)
Performs a search across all conventional, antimicrobial and biopesticide active ingredients registered with the EPA. Included are 20,000+ regulatory documents such as fact sheets, pesticide tolerances in the Code of Federal Regulations, and product labels. 

3) US Food and Drug Administration

This official web site of the Food and Drug Administration provides a wealth of information of toxicology issues related to food supply and pharmaceuticals.

4) UK Food Standards Agency: Chemicals in food: safety controls
The Food Standards Agency is an independent food safety agency set up by an Act of the British Parliament in 2000 to monitor and protect the public's health and consumer interests in relation to food.