How long can hot fried chicken maintain safe temperature in a thermal bag...Probably not overnight?

It is not recommended to store hot fried chicken in a thermal bag overnight, as it is unlikely to maintain a safe temperature for consumption.

According to the United States Department of Agriculture (USDA), cooked chicken should be consumed or refrigerated within two hours of cooking, or within one hour if left at room temperature. This is because bacteria can grow rapidly in the temperature danger zone between 40°F and 140°F.

Thermal bags are designed to help maintain the temperature of food, but they are not a substitute for refrigeration. The effectiveness of a thermal bag in maintaining food temperature depends on several factors, such as the initial temperature of the food, the ambient temperature, and the quality of the thermal bag.

While a thermal bag may help to slow the rate of cooling, it is not likely to keep hot fried chicken at a safe temperature for an extended period of time, such as overnight. Therefore, it is best to err on the side of caution and refrigerate any leftover hot fried chicken within the recommended time frame.