Butyne may refer to either of two isomeric organic chemical compounds:
1-Butyne, also known as ethylacetylene, but-1-yne, ethylethyne, and UN 2452, is an extremely flammable and reactive alkyne with chemical formula C4H6 and CAS number 107-00-6 that is used in the synthesis of organic compounds. It occurs as a colorless gas.
2-Butyne (Dimethylacetylene, crotonylene or but-2-yne) is an alkyne with chemical formula CH3C≡CCH3. Produced artificially, it is a colorless, volatile, pungent liquid at standard temperature and pressure.
2-Butyne can be synthesized by the rearrangement of ethylacetylene in a solution of ethanolic potassium hydroxide.
2-Butyne, along with propyne, is used to synthesize alkylated hydroquinones in the total synthesis of Vitamin E.
Is it time to accept
Is it time to smile and rest
Is that all there is
Is it time to believe
In a theory of destinies
If it's true that the end
is nothing but
"this"
I trust it
Time to say "I'm only human"
You think it might be too late
But it's never even been time
Realize now that the ice
is meant to melt
And no one feels sorry
For the good times
Is it time to accept
Shall we smile and rest
Is it meant to be like this
If it's meant to be like this