According to reports, the active ingredient of most mosquito repellent incense (0.2% - 0.4%) is a pyrethroid insecticide, which is extracted from a permethrin insecticide, more than 99% of the other substances are organic fillers, adhesives, dyes and other additives, the mosquito repellent incense can smolder without flame. Most consumers do not understand is that this kind of mosquito repellent incense burning smoke contains four kinds of harmful to human body material, i.e. ultrafine particles (diameter smaller than 2.5 microns particulate matter), polycyclic aromatic hydrocarbons (PAHs), carbonyl compounds (such as formaldehyde and acetaldehyde and benzene.

Mosquito repellent incense release of pollutants, to humans may produce a strong toxic reaction, exacerbate asthma (causing shortness of breath and chest diseases) to acute poisoning, led to the emergence of difficulty in breathing, headache, eye pain, feel asphyxia, itching, bronchitis, cough, wind damage, nausea, sore throat and earache and other phenomena, more serious is bottom of the particles and gases will be inhaled into lung and may cause cancer, experts said.

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