In a nutshell

Formulations are made up of several different compounds and/or elements which are used in specific quantities. The type of chemicals can be changed and the quantities can be altered to make the formulation more suitable for a different function.

Formulations

A pure substance is one which contains only one type of compound or element.

Formulations are mixtures which contain specific amounts of several compounds and/or elements. The type of substances used and the quantities they are used in determine the properties of the formulation and therefore its function.

Formulations are created for a specific purpose and each formulation is made using a different recipe.

Useful formulations

Formulations are found in products used in everyday life such as fuels, cosmetics, perfume, processed foods and fertilisers.

Example	Explanation
*Medical pills*	Medical pills are made up of drugs, binders and preservatives. The formulation of pills are carefully selected to ensure that the drugs are delivered to the target in the correct concentration, the pills have a sufficient shelf life and can be easily consumed.
*Paint*	Paint is made up of several components: pigment, solvent, binder and additives. The quantity and type of chemicals can be altered to give a different colour or thickness, therefore making the paint suitable for a different purpose.
*Perfume*	Perfume is made up of fragrances, which give the perfume its characteristic smell, and solvent which prevents different layers of liquid from forming.
*Processed food*	Processed food is made up of ingredients which give the desired flavour, texture and preservatives which ensure that the shelf life is suitable.