Physical Properties

Physical properties are characteristics of a substance not related to its chemical composition. This can include some of the following characteristics:

• Vapor density
  • The measure of a vapor in relation to air. Knowing the vapor density will allow you to know whether the gas or vapor will sink or rise in the air in the instance of a release.
• Color
• Melting point or freezing point
• Boiling point
• Electrical conductivity
• Vapor pressure
  • The measure of a liquids tendency to evaporate. A high vapor pressure translates to a greater volatility.
• Flash point
  • The minimum temperature at which a liquid gives off a vapor that is ignitable. This number is an indication of the susceptibility to ignition.

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