What is the structural formula for glycerol?

Glycerol, or glycerin, is a simple polyol compound that is commonly known for its three hydroxyl (-OH) groups, which provide it with unique properties such as being sweet-tasting and hygroscopic. The correct structural formula for glycerol is represented as CH₂(OH)-CH(OH)-CH₂(OH).

The choice representing glycerol correctly illustrates each carbon atom's connectivity and the presence of hydroxyl groups. In this structure, there are three carbon atoms, each bonded to hydroxyl groups. The first carbon in the chain bonds to two hydrogen atoms (–CH₂), the second carbon has an –OH group attached (–CH(OH)), and the third carbon also bonds to two hydrogen atoms, making it another –CH₂(OH) group.

Overall, this structural representation effectively captures the three-dimensional arrangement of the atoms and the functional groups, providing a complete view of the molecule's formula. Each component in the structure accurately reflects glycerol’s chemical properties, reinforcing why this choice is correct.