Yes, isobutane in mousse is the same as butane in lighters. Isobutane is a hydrocarbon gas with the chemical formula C4H10. It is a colorless, odorless gas that is highly flammable. It is used as a propellant in aerosol products, such as shaving cream, whipped cream, and spray paint. It is also used as a fuel in camping stoves and lighters. Isobutane is also known as 2-methylpropane.

Butane is a hydrocarbon gas with the chemical formula C4H10. It is also a colorless, odorless gas that is highly flammable. It is used as a fuel in lighters, camping stoves, and portable grills. Butane is also used to produce lighter fluid. Butane is also known as n-butane.

Isobutane and butane are very similar gases. They have the same chemical formula and they are both highly flammable. However, there are some slight differences between the two gases. Isobutane has a slightly higher boiling point than butane. This means that isobutane will condense into a liquid at a higher temperature than butane. Isobutane also has a slightly higher specific gravity than butane. This means that isobutane is slightly denser than butane.

Overall, isobutane and butane are very similar gases with similar properties and uses.