CAS - Molecule of the Week

Molecule of the Week
May 22, 2006

This molecule was originally selected on May 5, 2003

Regarding this week’s selected substance:

Histamine is the chemical messenger that antihistamine medicines try to block. Histamine is released by mast cells during an allergy attack and can produce multiple biological effects including bronchoconstriction (asthma), vasodilation (watery eyes, runny nose), and gastric acid secretion.


CAS, Chemical Abstracts Service, has a variety of electronic products that deliver the most recent information, as well as earlier research back to the beginning of the twentieth century.

SciFinder® was used to locate this record in the CAS REGISTRYSM database, the world's largest substance database, with over organic and inorganic substances and more than sequences.

Using SciFinder, you can easily locate relevant published research for the substance.

Clicking on the Microscope icon provides details of the research articles of interest.

For more information on SciFinder or other CAS information products, go to the CAS Products page.

Return to


Home| Products| Service| Search