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:
“Black lady,
what will I do
without your two flowers?
I have inhabited you, number by number.
I have pushed you in and out like a needle.”
—Anne Sexton (1928–1974)