CTD: Search

Chemicals: Browse relationships among chemicals, and obtain detailed information about them, including structure, toxicology data and related genes, diseases, pathways and references.
Diseases: Browse relationships among diseases, and obtain detailed information about them, including related chemicals, genes, pathways and references.
Genes: Search for genes from diverse vertebrates and invertebrates by symbol, synonym, accession ID, organism taxon, chemical, interaction type, disease or Gene Ontology annotation.
Chemical–Gene Interactions: Search for cross-species chemical–gene and protein interactions curated from the published literature. Interactions may be retrieved by chemical, interaction type, gene, organism or Gene Ontology annotation.
References: Search for references by gene, organism taxon, chemical, chemical–gene interaction type, disease, citation information or accession ID.
Batch Query: Download data associated with an input list of chemicals, diseases or genes.
Keyword Query: Search for data by name, synonym, accession identifier and other keywords by using the keyword query box at the top of every page.

Comparative Toxicogenomics Database