What are the limits for what is considered a flammable liquid and what is not?
A3. The defining criteria for a Class 3 (flammable liquid) material are prescribed in § 173.120(a) and are as follows: • A liquid having a flashpoint of not more than 60 ºC (140 ºF), or • Any material in a liquid phase with a flash point at or above 37.8 ºC (100 ºF) that is intentionally heated and offered for transportation at or above its flash point in a bulk packaging. A combustible liquid is also a Class 3 material. Its defining criteria are prescribed in § 173.120(b) and are as follows: • Any liquid that does not meet the definition of any other hazard class specified in the HMR and has a flash point above 60 ºC (140 ºF) and below 93 ºC (200 ºF). • A flammable liquid with a flash point at or above 38 ºC (100 ºF) that does not meet the definition of any other hazard class may be reclassed as a combustible liquid. This provision does not apply to transportation by vessel or aircraft, except where other means of transportation are impractical. An elevated temperature material that m
