Phenylacetone (1-phenyl-2-probanone) is a colourless to pale yellow liquid with a strong, characteristic odour. Phenylacetone is used in the chemical industry for synthesis purposes; it can be used to produce amphetamine by means of reductive amination. Phenylacetone is highly flammable and toxic. It is both a synthesis by-product and a potential extender; the powdered amphetamine sulphate can be reliquefied and the product sold as amphetamine paste.
Amphetamine pastes should always be dried well before use! In addition, always have your amphetamine chemically analysed if possible.