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Chemcyclopedia’s encyclopedic coverage of the world’s major chemical products embraces the following principal areas:

  • Organic (aliphatic, aromatic, alicyclic, heterocyclic, hydrocarbon, chiral)
  • Organometallic
  • Inorganic (metallic, non-metallic, rare-earth)
    with many hundreds of Specialty and Fine Chemicals being represented.

  • Chemfinder

    CHEMFINDER finds ...
    Chemical Structures: 2D structures & 3D models
    Physical Properties: MP, BP, CAS RN, & more
    Hyperlinks: Links to other websites with information about the searched compound

    CHEMID"  info

    ChemIDplus is a free, web-based search system that provides access to structure and nomenclature authority files used for the identification of chemical substances cited in National Library of Medicine (NLM) databases. ChemIDplus also provides structure searching and direct links to many biomedical resources at NLM and on the Internet for chemicals of interest. The database contains over 400,000 chemical records, of which over 300,000 include chemical structures, and is searchable by Name, Synonym, CAS Registry Number, Molecular Formula, Classification Code, Locator Code, and Structure.

    PubChem"  info

  • PubChem Substance
    contains over 800,000 chemical samples imported from 14 public sources including ChemIDplus, the Developmental Therapeutics Program at NCI, KEGG, NCBI MMDB, and the NIST Chemistry WebBook.
  • PubChem Compound
    Chemical entities in PubChem Substance records that have known structures are validated, converted to a standardized form, and imported into PubChem Compound. This standardizing allows NCBI to compute chemical parameters and similarity relationships between compounds. The compounds are grouped into levels of chemical similarity from most general to most specific.
  • PubChem BioAssay
    currently contains over 170 bioactivity studies from the Developmental Therapeutics Program at NCI, and each of these studies is linked to records in PubChem Substance. The PubChem Bioassay interface allows users to view substances that meet certain activity and/or chemical criteria, and access the matching records in PubChem Substance or downloaded in several formats.