The alcohols are a homologous seriesA 'family' of organic compounds that have the same functional group and similar chemical properties. of organic compoundCompounds that contain carbon atoms, joined by covalent bonds to other atoms (including other carbon atoms). with the general formula:
CnH2n+1OH
They all contain the functional groupAn atom, or group of atoms, that determines the main chemical properties of an organic compound.–OH, which is responsible for the properties of alcohols.
The names of alcohols end with ‘ol’, eg ethanol.
The first three alcohols in the homologous series are methanol, ethanol and propanol. They are highly flammableAble to ignite and burn., making them useful as fuels. They are also used as solventThe liquid in which the solute dissolves to form a solution. in marker pens, medicines, and cosmetics (such as deodorants and perfumes).
Ethanol is the alcohol found in alcoholic drinks such as wine and beer. Ethanol is mixed with petrol for use as a fuel.
Here are the names and structures of the simplest alcohols: