Food held between 5oC and 60oC for less than 2 hours can be used, sold or put back in the refrigerator to use later. Food held between 5oC and 60oC for 2-4 hours can still be used or sold, but can't be put back in the fridge. Food held between 5oC and 60oC for 4 hours or more must be thrown away.
The 2 Hour/ 4 Hour Rule tells you how long freshly potentially hazardous foods*, foods like cooked meat and foods containing meat, dairy products, prepared fruits and vegetables, cooked rice and pasta, and cooked or processed foods containing eggs, can be safely held at temperatures in the danger zone; that is between ...
Remember the 2-Hour Rule: Discard any perishables left out at room temperature for more than 2 hours, unless you're keeping it hot or cold. If the buffet is held in a place where the temperature is above 90 °F, the safe holding time is reduced to 1 hour.
Myth: You shouldn't put hot foods in the refrigerator.
If you leave food out to cool and forget about it after 2 hours, throw it away. Bacteria can grow rapidly on food left out at room temperature for more than 2 hours.
Bacteria grow most rapidly in the range of temperatures between 40 °F and 140 °F, doubling in number in as little as 20 minutes. This range of temperatures is often called the "Danger Zone." Never leave food out of refrigeration over 2 hours.
If raw meats have been mishandled (left in the "Danger Zone" too long), bacteria may grow and produce toxins which can cause foodborne illness. Those toxins that are heat resistant are not destroyed by cooking.
Temperature danger zone: 41 to 135 degrees F. The longer food is in the temperature danger zone, the more time pathogens have to grow. The goal is to reduce the amount of time TCS food spends in the temperature danger zone. If food is held in this range for four or more hours, you must throw it out.
Unless the cooked chicken is kept warm, above 140°F, the general rule of thumb for cooked chicken is that it should not sit out on your kitchen table or buffet for more than two hours. Any cooked chicken left at room temperature for more than two hours should probably be thrown out.
Emergency power failures
Once cold or frozen food is no longer cold to touch, it can be kept and eaten for up to 4 hours and then it must be thrown away. If it is raw meat, it should be cooked and eaten. Eat hot food within 4 hours of it being heated or throw it away.
Unfortunately, as mouthwatering as those leftover slices may look in the morning if you accidentally leave pizza out on the counter overnight it's best to throw it away.
How it works. Food held between 5°C and 60°C for less than 2 hours can be used, sold or put back in the refrigerator to use later. Food held between 5°C and 60°C for 2-4 hours can still be used or sold, but can't be put back in the fridge. Food held between 5°C and 60°C for 4 hours or more must be thrown away.
The 4Cs of food hygiene
Cleaning. Cooking. Chilling. Cross-contamination.
If a perishable food (such as meat or poultry) has been left out at room temperature overnight (more than two hours) it may not be safe. Discard it, even though it may look and smell good. Never taste a food to see if it is spoiled. Use a food thermometer to verify temperatures.
Watch the Clock
Remember the 2-Hour Rule: Discard any perishables left out at room temperature for more than 2 hours, unless you're keeping it hot or cold. If the buffet is held in a place where the temperature is above 90 °F, the safe holding time is reduced to 1 hour. Watch the clock with leftovers, too!
TCS foods that are ready-to-eat can be safely consumed in a four hour window. If they have not been temperature controlled, they should be discarded after four hours. Hot held and cold held foods can be served for four hours without temperature controls if they are discarded after the four-hour time limit.
Remember, reheating means cooking again, not just warming up. Always reheat food until it is steaming hot all the way through (you should only do this once). Do not put food into hot holding without reheating it properly first. Check that reheated food is steaming hot all the way through.
As the USDA notes in Keeping Food Safe During an Emergency, your refrigerator will keep food safe for up to 4 hours during a power outage.
When in doubt, throw it out. Throw out perishable food in your refrigerator (meat, fish, cut fruits and vegetables, eggs, milk, and leftovers) after 4 hours without power or a cold source like dry ice.
Fruit that is beginning to ferment is safe to eat, but will have an off-flavor. Such fruit could be used in cooking, but it is not recommended. Frozen Foods and Frozen Dinners: Do not refreeze frozen foods that have thawed; either cook them for consumption, discard or refreeze after cooking thoroughly.
According to the USDA, cooked chicken will last three to four days in the refrigerator, and two to three months in the freezer. Eating cooked chicken after this point can result in foodborne illness — even at refrigerated temperatures, bacteria can still grow.
Reheating food may not make it safe. If food is left out too long, some bacteria, such as staphylococcus aureus (staph), can form a heat-resistant toxin that cooking can't destroy.
You should not eat fried chicken from KFC or any food that has been in the fridge for a week. Chicken should be consumed within 3-4 days of being stored in the fridge. If you plan to keep KFC food leftovers for more than four days or later date, then freeze them in the freezer right away.
Perishable foods should never be thawed on the counter, or in hot water and must not be left at room temperature for more than two hours.
The 'temperature danger zone' is between 5°C and 60°C, when it is easiest for bacteria to grow.
Food held between 5oC and 60oC for less than 2 hours can be used, sold or put back in the refrigerator to use later. Food held between 5oC and 60oC for 2-4 hours can still be used or sold, but can't be put back in the fridge. Food held between 5oC and 60oC for 4 hours or more must be thrown away.