Certain liquids and oils we sell are flammable under very specific conditions. The flashpoint refers to the lowest temperature at which a liquid can form an ignitable mixture in the air, essentially, the point at which it can ignite if held to a flame. 
Flash Point is of particular concern as regards shipping. There are rules and regulations which govern the shipping of low flash point materials in order to ensure safety. Due to this fact low flash point oils cannot be shipped by air, nor can they be shipped via USPS.
Low flashpoint oils and liquids can only be shipped via Ground Only. See below for more detailed restrictions.
200 Degrees or above: No shipping requirements.
142-199 Degrees: “Medium” Flashpoint- Will ship UPS Only. 
141 Degrees and below: “Low” Flashpoint- Will ship Ground Only. 
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