The Marketing picture is at 60 Crad the dosage recommendation is at 60C.
It is scientifically proven that it kills all germs at 60C, this is a "hygiene cleaner".
My washing machine has its own programme which is at 70C
You can also use it at 90 C, but I would advise against it.
Reason: from 94 C the ingredients are forfeited because the temperature is too high. Although the flash point is mentioned here, this will probably not work with water.
I would advise you to use between 60-80 C and no more as a 90C wash has a deviation of +- 5C.
Greetings