Protection from light is required. According to the query of relevant public information, when using vanillin, care should be taken to protect it from light and oxidation. This is because vanillin is susceptible to degradation by light and loss of flavor and color. Therefore, when storing and using vanillin, prolonged exposure to sunlight or strong light should be avoided, and it is best to keep it in a cool, dry, and light-protected environment. Contact with air and water should also be avoided to avoid oxidation and deterioration. Vanillin is an organic synthetic substance and a commonly used ingredient in flavors and fragrances.