A chemical or heat-based agent used to reduce micro-organisms on a cleaned surface to a safe level.
A chemical or heat-based agent used to reduce micro-organisms on a cleaned surface to a safe level. A sanitiser is the agent used in the sanitising step to reduce micro-organisms on a cleaned food contact surface to a safe level. Chemical sanitisers are the most common in food businesses and include products based on chlorine, quaternary ammonium compounds and other food-safe actives. Heat can also act as a sanitiser, for example very hot water or steam. A sanitiser is not a cleaner: it is designed to reduce bacteria, not to remove grease and dirt. Because a sanitiser works chemically, it only performs as intended when used at the right concentration and left on the surface for the correct contact time stated on the label. Too weak, or wiped off too soon, and it will not reduce micro-organisms effectively; too strong, and it may leave unsafe chemical residues. Some combined products are sold as detergent-sanitisers, but even these generally work best when the surface is cleaned first. Australian food businesses choose sanitisers that are suitable for food contact surfaces and use them strictly according to the manufacturer's instructions, including dilution rate and contact time. Staff dilute concentrates correctly rather than guessing, and let the sanitiser sit for the labelled time before the surface is used. Where required by the label, a final potable water rinse removes chemical residue. Sanitiser must be stored safely, clearly labelled, and kept away from food, packaging and food contact surfaces to avoid chemical contamination. Spray bottles should be labelled with their contents so no one confuses sanitiser with another chemical. Many venues also use a commercial dishwasher's hot cycle as a heat sanitiser for utensils, which removes the need to handle chemicals for those items. A takeaway shop buys a concentrated food-grade sanitiser. Instead of eyeballing it, the supervisor sets up a labelled spray bottle diluted to the exact rate on the container and trains staff to spray cleaned benches, wait the contact time printed on the label, then air dry. Kept in a labelled bottle away from food, the sanitiser reduces bacteria effectively without leaving unsafe residue or being mistaken for another product.
Frequently asked questions
What is the difference between a sanitiser and a detergent?
A detergent removes grease, dirt and food residue during cleaning. A sanitiser reduces the micro-organisms left behind to a safe level. They do different jobs, which is why you clean with detergent first and then sanitise.
How do I use a chemical sanitiser correctly?
Dilute it to the concentration on the label, apply it to an already cleaned surface, and leave it for the stated contact time before use. Rinse afterwards only if the label requires it. Never guess the dilution.
Can heat be used instead of a chemical sanitiser?
Yes. Very hot water, steam or a commercial dishwasher running hot enough can sanitise by heat, which is common for utensils and small equipment and avoids handling chemicals.
Is a stronger sanitiser mix more effective?
No. Using more than the labelled concentration wastes product and can leave unsafe chemical residues on food contact surfaces. Follow the manufacturer's dilution rate exactly.
How should sanitiser be stored?
In clearly labelled containers, away from food, packaging and food contact surfaces, to prevent chemical contamination and to stop it being confused with other products. This aligns with the chemical storage requirements of the Code.
