Understanding why 5C to 63C is dangerous and how to keep food out of it is part of working safely with food - and part of what an online HACCP course teaches. This guide explains it in plain language for anyone working in an Irish kitchen, deli, bakery or food business.
Why 5C to 63C is dangerous
Between 5C and 63C, the bacteria that cause food poisoning multiply fastest. Some double every 20 minutes, so a few hours in the danger zone can turn safe food into a serious risk. The whole point of refrigeration, cooking and hot holding is to keep food out of this band.
- Keep cold food at or below 5C.
- Cook food to a 75C core (or an equivalent time and temperature).
- Hot-hold food at or above 63C.
- Cool hot food through the zone quickly - ideally within 90 minutes to two hours.
- Reheat once only, to 75C.
Getting this right is not just about passing an inspection. It protects your customers, your reputation and your livelihood. A single food safety incident can close a business for days, trigger an FSAI closure order and end up in the local press - so the few minutes it takes to understand and apply this control are some of the best-value minutes in any food business.
This is one of the core ideas covered in the FSAI-aligned HACCP course, which gives every food handler the knowledge and a certificate the same day. Online training builds awareness; your employer still provides task-specific training and supervision on site.
Key takeaways
- Why 5C to 63C is dangerous and how to keep food out of it is part of the HACCP-based procedures every Irish food business must follow.
- Apply a simple, written control and record that it is working.
- Train every food handler so the control becomes second nature.
- The online HACCP course covers this and issues a certificate the same day.
Related reading
Get certified on the HACCP course
Ready to go? Start the HACCP course now. It takes about an hour, the FSAI-aligned certificate is issued the same day, and you can certify a whole team at once. You can also explore the HACCP training options or read more on the HACCP blog.
Frequently asked questions
Why does this matter for food safety?
Because it is one of the controls that keeps food safe and customers protected. Getting it wrong is a common cause of food poisoning and failed inspections, which is why it is taught on every HACCP course.
Is this covered in the online HACCP course?
Yes. The online HACCP course covers this alongside the full HACCP system, and issues an FSAI-aligned certificate the same day.
Who needs to know this?
Anyone who prepares, cooks, serves, stores or transports food, or cleans food-contact equipment. New staff need Level 1 and high-risk food handlers need Level 2.
