2. Vinegar, also known as vinegar, is an acidic condiment containing acetic acid. Vinegars include rice vinegar, aged vinegar, fragrant vinegar, bran vinegar, wine vinegar, white vinegar, various fruit juice vinegar, garlic juice vinegar, ginger juice vinegar, health care vinegar and so on. Because of the different raw materials and manufacturing methods, the taste of the finished product is different. Vinegar is a kind of acid condiment which is widely used. The content of acetic acid in 100mL vinegar is above 3.5g in general vinegar and above 5g in excellent vinegar. Because vinegar can improve and regulate human metabolism, it is in increasing demand as a dietary condiment.