Little Pro on 2016-01-13 Views: Update:2018-04-02
Boiling point is the temperature at which the vapor pressure of a chemical equals atmospheric pressure. To simply put, it measures the temperature at which a chemical boils. Similar to melting point, a higher boiling point indicates greater inter-molecular forces and therefore less vapour pressure. You can often find it in the section 9 of a safety data sheet (SDS).
Besides indicating the physical state (liquid or gas) of a substance at ambient or room temperature, boiling point serves as an indicator of volatility even for laymen, with higher boiling points indicating lower volatility. The boiling point is a key input in equations that provide estimates of a chemical’s vapour pressure.
Knowing the boiling point of a chemical is also very important for its storage & transport. You probably do not want to store or transport a liquid at a temperature close to or above its boiling point in which case the boiling may cause leaking and severe consequences.
Boiling point test is not required for every chemical. Under EU REACH, boiling point test is not required for gases, or for solids which either melt above 300 °C or decompose before boiling.
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