4hw.com.cn: summer is coming, and mosquitoes are beginning to rage. At this time, mosquito repellent incense will be of great use. Many friends will turn over the mosquito repellent incense that they didn't use last year to repel mosquitoes. However, mosquito repellent incense actually has a shelf life, so can it be used when it's expired? Let's have a look.
Can mosquito repellent incense be used after expiration
Mosquito repellent incense can't be used when it's expired. Because mosquito repellent and killing effect will be lost after expiration of mosquito repellent incense, and harmful substances may also be produced, which will affect health. The smog of mosquito repellent incense contains ultrafine particles, polycyclic aromatic hydrocarbons, carbonyl compounds and benzene. These substances are harmful to human health. However, some white, yellow or brown mildew spots will be generated on the surface of expired mosquito repellent incense. These expired mosquito repellent incense not only has poor mosquito repellent effect, but also emits an unpleasant smell. The use of expired mosquito repellent incense will be harmful to the respiratory system Don't use expired mosquito repellent incense.
Is it harmful to use expired mosquito repellent incense
Respiratory tract irritation
The expired mosquito repellent incense burning smoke contains harmful substances to human body. These substances are ultrafine particles, polycyclic aromatic hydrocarbons, carbonyl compounds and benzene. If people inhale too much of these harmful substances, it will stimulate the respiratory tract, lead to cough, and also can induce asthma and bronchitis.
Dyspnea
In the process of burning expired mosquito repellent incense, the oxygen in the room will be consumed, which will reduce the oxygen content in the room. If the mosquito repellent incense is not completely burned, carbon monoxide will be produced. If the human body stays in the room with expired mosquito repellent incense for too long, it may cause breathing difficulties, dizziness, fatigue and other symptoms.
Sometimes the mosquito repellent incense we bought last year hasn't been used up. It's found that it's expired this summer. Can it still be used at this time?
How long is the shelf life of mosquito repellent incense
The shelf life of mosquito repellent incense is generally about three years. When you buy mosquito repellent incense, you should carefully check its shelf life to see if it has expired. Do not buy expired mosquito repellent incense. The opened mosquito repellent incense is easy to get wet after contacting with the air, and its shelf life will be shortened. Therefore, the disassembled mosquito repellent incense should be used up within one month. If it can't be used up immediately, it is better to store it in a dry and ventilated place.
How to keep mosquito repellent incense
Mosquito repellent incense is best stored in a cool and ventilated place, not in a damp place as far as possible, and avoid direct sunlight, keep away from the fire and avoid fire. It should also be placed in places that children can't get. In order to avoid children's eating by mistake, the disassembled mosquito repellent incense should be moisture-proof to avoid deterioration of mosquito repellent incense.