CAS Number
Every chemical substance, including chemical compounds, that has been described in the literature carries a unique numerical identifier, its CAS number.
Read more about this topic: Chemical Compound
Famous quotes containing the word number:
“A considerable percentage of the people we meet on the street are people who are empty inside, that is, they are actually already dead. It is fortunate for us that we do not see and do not know it. If we knew what a number of people are actually dead and what a number of these dead people govern our lives, we should go mad with horror.”
—George Gurdjieff (c. 1877–1949)