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Butane - Wikipedia
Butane | Flammable Gas, Fuel, Refrigerant | Britannica
Butane | C4H10 | CID 7843 - PubChem
Butane (C4H10) - Structure, Molecular Mass, Properties & Uses
Butane | Formula, Properties & Application
Butane | Encyclopedia.com
Butane - Energy Education
Butane - Simple English Wikipedia, the free encyclopedia
Butane - NIST Chemistry WebBook
C4H10 - Wikipedia