Here is a list of the most common food additives and what they do:
Food Standards Australia New Zealand (FSANZ) regulates the use of food additives. It checks they are safe, that there are good reasons for their use, and that consumers are notified of their presence. Use of a food additive is approved only if it can be proved that it will cause no harmful effects to somebody without sensitivities to that additive.
Each food additive has a function, name and number (such as 220), and the ingredients list on food packaging will tell you which are present in any particular food. The website of FSANZ provides a list of all additives by name and by number.
Generally, food additives do not cause harmful effects. If somebody in your family is sensitive to one or more food additives, speak to your doctor before your child comes into contact with food additives.
Food Standards Australia New Zealand (n.d.). Food additives.
Retrieved February 21st, 2006, from http://www.foodstandards.gov.au/newsroom/factsheets/factsheets2006/whatarefoodadditives3233.cfm