Is a boiling point is chemical characteristic?

The boiling point of a substance is the temperature at which its vapor pressure becomes equal to the surrounding atmospheric pressure and the substance changes into a vapor. The boiling point of a substance is a characteristic property that can be used to identify the substance. For example, the boiling point of water is 100 degrees Celsius at sea level, while the boiling point of ethanol is 78.4 degrees Celsius at sea level. The boiling point of a substance can also be used to determine its purity. For example, if the boiling point of a sample of water is lower than 100 degrees Celsius, it may be contaminated with impurities.