Everyone knows about mosquito coils, right? When mosquitoes buzz around your ears at night, we naturally think of lighting one. But do you know if mosquito coils pose health risks? Let's examine the findings below.But I see labels like "low toxicity" or "slightly toxic" on the packaging, which makes me worry about its toxicity. Could it really harm human health?
Dr. Ye Qiao, Director of Occupational Disease and Toxicology at Beijing Chaoyang Hospital (affiliated with Capital Medical University), answers: Mosquito coils release insecticides through burning or heating to achieve repellent effects.Traditional mosquito coils come in stick and spiral forms, while newer types include liquid and solid electric repellents. All share similar active ingredients and repellent mechanisms. As early as 2004, mosquito coils were classified under pesticide regulations. China categorizes pesticide toxicity into five levels: highly toxic, moderately toxic, low toxicity, and minimal toxicity. National standards classify mosquito coils as low-toxicity or minimal-toxicity products.
The primary components of mosquito coils are small amounts of insecticidal pesticides, including organophosphates, carbamates, and pyrethroids. Among these, organophosphates are the most toxic, while pyrethroids are the least toxic.Most mosquito coils utilize pyrethroid insecticides as their active ingredient. Over 90% of coils on the market contain pyrethroids, a low-toxicity, high-efficiency pesticide approved for use in China with regulated application ratios. Traditional mosquito coil smoke contains fine particulate matter, polycyclic aromatic hydrocarbons, carbonyl compounds, and benzene. While these may pose potential health risks, their low concentrations render them essentially harmless when used appropriately.It is important to note that mosquito coil smoke may trigger allergic reactions or asthma attacks. Individuals with such conditions should exercise caution when using them. Placing excessive mosquito coils in an enclosed room may cause poisoning symptoms such as dizziness, headaches, nausea, blurred vision, and breathing difficulties.It is recommended to use only one coil of mosquito coil in a 15-square-meter room. For safety, avoid placing lit coils near the head to minimize smoke inhalation. The best time to use mosquito coils is in the evening, before darkness sets in. Ensure all windows and doors are closed during use, and both people and pets should leave the room. Ventilate the space thoroughly afterward.