No, vinegar is not flammable. It is primarily composed of acetic acid and water, with the acetic acid usually making up about 5-20% of its content. The flash point of a substance is the lowest temperature at which it can vaporize to form an ignitable mixture in air. The flash point of vinegar is considerably higher than room temperature, typically around 60°C (140°F) or higher, depending on its concentration.
This means that vinegar will not ignite or catch fire under normal circumstances or temperatures found in everyday environments. While it may have a pungent odor and can cause irritation if mishandled, the risk of it being flammable is negligible. Therefore, you can handle vinegar safely without worrying about fire hazards, making it a popular choice for cooking and cleaning purposes.