Formaldehyde, a colorless, intensely pungent odor, is easily soluble in water, alcohol and ether. At room temperature, it is gaseous, and 35 to 40% of the aqueous solution is called Faure Marin. Highly toxic pollutants are identified as "carcinogens" and malformed substances by WHO.

In life, formaldehyde can be said to be everywhere. Interior decoration materials, new combinations of home has it; the curtains, carpets, textiles used in the home have it; buy food has it; buy new clothes have it; buy new cosmetics have it; buy new cars have it...

It is not difficult to see that formaldehyde has penetrated into all aspects of our daily life, such as clothing, food, shelter and transportation, it can be said that "look up, look down."

In this sense, is it not dangerous for us to be surrounded by "carcinogens" every day?

This is not the case. There is a popular saying in toxicology, which is called "off the dose" and "toxicity". What‘s more, formaldehyde is not poisoned. It does not reach the point where it smells or dies.

When it comes to the dosage of formaldehyde, we should take a comprehensive view from two aspects, one is the concentration and absolute intake, the second is the physical fitness of the individual, especially weight. High concentration but low absolute intake, enough body weight, good enough constitution, may not be a problem. Low concentration, but long-term absolute intake, intake of light weight, poor health, may be a big problem.

It‘s like, a rat poison can kill a mouse, but for a whale, this dose doesn‘t do much, it probably doesn‘t. Therefore, for formaldehyde, we still need to see the intake dose and body weight.

According to the research data of mice, we found that The mice were exposed to formaldehyde at 15ug/m (0.015mg) per cubic meter for 11 months, which could cause nasal cancer. An adult mouse weighs about 300 grams, and our newborn baby weighs between 2500 and 4000 grams, more than 10 times the weight of a mouse. This also means that it may take 150 UG / m (0.15 mg / m) of formaldehyde to stay for 11 months, which can cause cancer in the newborn.

When the content of formaldehyde in the indoor air is 0.30mg/m, it can make people feel strange smell and discomfort. When the content is 0.50mg/m, it can cause tears, and when the concentration is 0.60mg/m, it can cause sore throat or pain. If the concentration is higher, it can cause nausea, vomiting, cough, chest tightness, wheezing and even emphysema. When it reaches 30mg/m, it can cause death immediately.

According to the National Standard of the People‘s Republic of China, the limit value of formaldehyde in indoor air of type II civil construction projects is 0.10mg/m_and that of type I civil construction projects is 0.08mg/m_.

A total of 40 papers on the relationship between formaldehyde and human health were reviewed. Among them, there are many data on the effects of formaldehyde on human health. Among them, the data with the lowest concentration are from Yang Yuhua, Institute of Hygiene and Environmental Medicine, Academy of Military Medical Sciences, and published in PLA preventive medicine. Learn the magazine‘s 2005 paper. The lowest concentration of formaldehyde for eye irritation is about 0.01mg/m_and indoor formaldehyde concentration is about 0.07mg/m, or 70ug/m_, which can cause mild respiratory inflammation in three-year-olds, the paper said.

However, the indoor safe concentration of formaldehyde is not higher than 0.08mg/m in China‘s indoor air quality standards. This standard is close to the lowest respiratory tract value of 0.07mg. Therefore, the formaldehyde concentration in the surrounding environment after formaldehyde emission is lower than 0.08mg/m whether indoor or in the vehicle, it can be considered to be relatively safe.

Formaldehyde has penetrated into all aspects of our clothing, food, housing and transportation, which requires us to pay attention to all aspects, and for new cars, new houses and other "formaldehyde exceeding the standard professional households", before using and checking in, to ensure that formaldehyde content conforms to the standard below 0.08mg/m after reuse, if exceeding the standard can be used Purify your breathing environment when air purifier or fresh air comes, and ensure that the formaldehyde content is within the safe value.

After entering a new house, we must pay attention to the following phenomena, which may indicate that indoor pollution exceeds the standard.

Every morning when I get up, I feel suffocated, nausea, dizzy, breathless, and change the environment will be significantly better.

Families catch cold easily, especially children and the elderly.

Indoor plants are not easy to survive, including plants with strong vitality, and their leaves are easily yellow and wilt.

Remind the family has children or the elderly and pregnant women, air pollution is more harmful to them, must always pay attention to indoor air is excessive.