In general this has come to mean a sample that contains the chemical formula of the compound.
The article on nose cone design contains possible shapes and formulas.
The legislation typically contains formulas that spell out the return of gas tax dollars to states.
For example it lets you highlight all cells containing formulae.
The Shadow knew, almost to a certainty, that the little book contained the formula for the antidote to the sleeping gas.
Then, troubled, she said, "This hypo doesn't contain the same formula."
He presents the astronauts with a box he says contains the formula for the miracle drug.
Should the constitution contain explicit formulas to guarantee that no one group dominates national institutions?
Yoakum received a sealed envelope that supposedly contained the formula.
The envelope contained the chemical formula of Mason's invention.