Is it okay to heat milk powder at a constant temperature of 45?

Milk powder cannot be heated at a constant temperature of 45℃. The prepared milk powder can be stored for two hours in a 45-degree thermos bottle, but the storage time is between half an hour and one hour at high temperature. If milk powder has been stored in a thermostatic bottle for four hours, it is not recommended to give it to children, because milk powder stored at high temperature for too long may produce a lot of bacteria and harmful substances, so children may feel uncomfortable after drinking it.