Limonene, commonly known as lemon essential oil, is usually used to make citrus flavors. It is one of the chemical constituents that are used in many fragrances such as air fresheners, body sprays, etc. Limonene is not terrible in itself, because it does not cause great harm to human body. In fact, it can be used as seasoning agent for food. However, once it is sprayed into the air, limonene will soon change. When limonene is exposed to ozone, which generally exists in the air, two limonene molecules will form a single molecule compound methanol. When a large number of limonene in the room is converted into methanol, its effects will be very different.
Using limonene as a food flavoring agent will do harm to human body can be introduced.