Sulfur hexafluoride (SF₆) is a colorless, odorless, non-toxic gas used as an insulating material in electrical equipment.

Ethylene (C₂H₄) is the simplest alkene, featuring a double bond between two carbon atoms and widely used in plastics ripening.

Methane (CH₄) is a colorless, odorless gas made of one carbon atom bonded to four hydrogen atoms.

Ethane (C₂H₆) is a simple alkane hydrocarbon with single bonds between carbon atoms, second only to methane.