Methylated spirit is a useful product made from a mixture of substances. Table 6 shows the mass of the substances in a sample of methylated spirit. What name is given to a useful product such as methylated spirit?

A formulation is a mixture that has been designed as a useful product. Each component in the formulation has a particular purpose, and they are mixed in carefully measured quantities to ensure the product has the required properties. Methylated spirit is a formulation: it contains ethanol (the main solvent/fuel), methanol and pyridine (to make it undrinkable), and methyl violet (a dye for identification). Other examples of formulations include fuels, cleaning agents, paints, medicines, and alloys.