In the summer season, mosquitoes become a major nuisance, buzzing around people and causing irritation. More than just an annoyance, mosquito bites can transmit serious diseases like malaria, dengue fever, filariasis, and Japanese encephalitis. As a result, many people turn to insect repellents and mosquito coils to protect themselves, leading to a surge in sales of these products.
However, some of these products may carry hidden dangers. According to recent inspections by the AQSIQ (General Administration of Quality Supervision, Inspection and Quarantine), certain mosquito repellent products contain excessive or unregistered insecticides, which could be harmful to human health. In one test, 34 out of 60 mosquito coil samples and 2 out of 20 mosquito repellent water samples were found to have added unregistered chemicals. Additionally, two samples exceeded the allowed dosage of insecticides, potentially causing allergic reactions or poisoning—especially for vulnerable groups such as children, pregnant women, and the elderly.
Experts recommend that consumers carefully check product labels before purchasing. They should look for clear information on the active ingredients and their concentrations. Avoiding overly cheap products is also advised, as they may not meet safety standards. When using these products, it's important to follow instructions carefully, ensure good ventilation, and avoid using them near open flames or in enclosed spaces.
Another critical concern is fire safety. Mosquito repellent products, especially those containing alcohol, are highly flammable. For example, toilet water often contains 70–75% ethanol, making it as dangerous as 75-degree liquor. Due to this risk, some transportation authorities, such as in Tongliao City, have banned carrying these items on trains to prevent accidents.
Spray insecticides also pose similar risks. Their propellants, typically propane and butane, are highly flammable and can explode when exposed to heat or sparks. There have been several reported cases where improper use led to severe burns. One incident involved a child being burned after a lighter was used nearby while he was covered in toilet water. Another case saw a man burn his arm after lighting a cigarette shortly after applying insecticide.
To stay safe, experts advise keeping these products away from heat sources and open flames. Always store them in cool, dry places and avoid leaving them in direct sunlight. When using spray insecticides, make sure the room is well-ventilated and never use them near a flame. By taking these precautions, you can enjoy a safer and more comfortable summer.
Cross Recessed Screws
Application scope: mostly used for the connection of smaller parts.
It has pan head Screws, countersunk head screws, half countersunk head screws and large flat head screws. Pan head screws and large flat head screws are used in the occasion where the nail head is allowed to be exposed;
Half countersunk head screws have an arc-shaped head, and its top is slightly exposed after installation, and beautiful and smooth, generally used in instruments or precision machinery; countersunk head screws are used in places where the nail head is not allowed to be exposed.
2. Reference standard: Reference standard
Cross recessed pan head screws GB818-85
Cross recessed countersunk head screws GB819-85
Cross recessed umbrella head screws GB820-85
Cross Recessed Tapping Screws,Pan Head Tapping Screws,Stainless Steel Screws,Steel Head Tapping Screw
Kunshan Zhonggu Precision Hardware Co., Ltd. , https://www.zgfastener.com