What is the latest indoor formaldehyde standard stipulated by the state?

The main pollution sources of household formaldehyde

First, indoor decoration materials. Such as particleboard, fiberboard, composite floor, plywood, paints and coatings, etc., contain more than 11 kinds of volatile harmful substances such as formaldehyde, benzene, xylene and styrene.

the second is building materials. Such as granite, marble and some glazed bricks, can produce radioactive substances, such as radium, thorium, potassium, radon, etc. Long-term absorption of radon decay radiation can lead to lung cancer and nasopharyngeal cancer.

The third is indoor supplies. Harmful substances such as pesticides, correction fluids and cosmetics commonly used by people can also produce carbon monoxide, dichloromethane and other substances.

The national standard for the release of household formaldehyde

1, the Chinese people * * and the national standard "Hygienic Standard for Formaldehyde in Indoor Air" stipulate that the maximum allowable concentration of formaldehyde in indoor air is 1.18mg/m3.

2. The national standard "Solid Wood Composite Flooring" of the People's Republic of China stipulates that the formaldehyde emission of Class A solid wood composite flooring is less than or equal to 9 mg /111 g; The formaldehyde emission of Class B solid wood composite floor is equal to 9 mg-41 mg/111g.

3. The National Technical Requirements for Environmental Labeling Products-Artificial Wood Board stipulates that the formaldehyde emission in artificial wood board should be less than 1.21mg/m3; The formaldehyde emission in the wood floor should be less than 1.12 mg/m3.

Indoor formaldehyde content standard: According to the national mandatory standard, after closing doors and windows for 1 hour, the formaldehyde emission per cubic meter of indoor air shall not be greater than 1.18 mg; If it reaches 1.1-2.1 mg, 51% normal people can smell the odor; When it reaches 2.1-5.1 mg, the eyes and trachea will be strongly stimulated, and symptoms such as sneezing and coughing will appear; Above 11 mg, dyspnea; If it reaches more than 51 mg, it will cause critical diseases such as pneumonia and even lead to death.

How to control indoor formaldehyde

Ventilation method: The pollution release is the largest just after the renovation. At this time, the effect of deodorant is not much better. The best way is to open the window for ventilation. After the renovation of the new house is completed, it must be ventilated every day.

Plant method: firstly, it is safer than chemical formaldehyde removal method and has no secondary pollution. Compared with chemical formaldehyde removal method, it is extracted from plants, so the effect is better. With the improvement of people's living standards and the strengthening of environmental concepts, this pure herbal method to remove decoration pollution will become more and more popular among the people.

activated carbon method: it can adsorb harmful substances, but don't think that it will be tasteless at home immediately with activated carbon. Activated carbon lasts for 3 to 6 months, and then it will be saturated and lose its activity.

The above is the relevant content of the national indoor formaldehyde standard introduced by Xiaobian. I believe many friends have already understood it. You can have a reference for formaldehyde detection in your home according to the content standard explained by Xiaobian, and see if the indoor formaldehyde in your home meets the standard. If it exceeds the standard, it must be removed in time, so as to better protect the health of your family. Well, the introduction of Xiaobian is over here. I want to know more about it.