How long can salad dressing last in the sun?

Two hours. Salad sauce belongs to perishable food. Prolonged exposure to the sun will lead to food deterioration. The high temperature and sunlight in the sun will accelerate the growth of bacteria and the oxidation reaction of food, leading to the decline of food quality and microbial pollution. The salad dressing should not be exposed to the sun for more than two hours. Put it in the refrigerator as soon as possible to prevent bacteria from breeding and food from going bad.