A basic heterocyclic organic compound; a colourless, pungent toxic liquid.
The compound of hydrogen and oxygen. Colourless, odourless liquid; heavier than water.
A colourless gas with a pungent odour. It is widely used in industry.
The first member in the homologous series of 1-alkenes.
A colourless, heavier-than-air gas. Its geometric isomer is trans-2-butene.
An allotrope of oxygen, consisting of 3 oxygen atoms.
The first member of the homologous series of alkyne hydrocarbons.
A reddish-brown toxic gas, very reactive due to its unpaired electron.
A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in certain mineral waters and spring waters.
It is also used as a food additive, limescale and rust remover.
The simplest aromatic amine. Its scientific name is phenylamine.
One of the hydrogen halides, it is used for the production of alkyl bromides.
One of the oxides of sulphur, forms sulphuric acid with water.
The sixth member in the homologous series of straight-chain alkanes.
A component of DNA, it contains one less hydroxyl group than β-D-ribose.
The fourth member in the homologous series of alkanes.
One of the isomers of pentenes.
The lightest halogen, a pale yellow-green, toxic gas, extremely reactive. Its best known compound is teflon.
The simplest of the aromatic carboxylic acids.
A crystalline compound found in nucleic acids, coenzymes, nucleotides and nucleosides.