The harm of benzene is indeed not small, but there is a famous saying that "toxicity without dose is hooligan". This sentence is also very appropriate here. Any poison that does not reach a certain concentration is harmless. So what are the hazards of benzene and formaldehyde in terms of indoor (general residence) alone? Which is bigger?

It is concluded that under the present living conditions, the harm of formaldehyde will be greater.

The details are as follows: the main sources of indoor toxic volatile organic compounds are the slow release of various furniture, plates and decoration. For benzene, its main use is generally as a solvent in paints and adhesives. Benzene is relatively stable in chemical properties and exists as a liquid at room temperature. Formaldehyde mainly exists in various plates in the form of solid polymers. If the materials used are not very good, the inferior formaldehyde polymer will decompose, constantly producing gaseous formaldehyde and slowly releasing it. From this principle, liquid benzene is relatively easy to volatilize in a short time, and now with the development of chemical industry, many solvents do not need to use benzene, and most of them use water. That is to say, in terms of interior decoration, the amount of benzene has been much less, coupled with its volatility, under normal circumstances, indoor benzene is not easy to exceed the standard. Our investigation found that in some factories that use more chemical solvents, such as shoe factories and electronics factories, benzene is still widely used, and the benzene concentration in the workshop is easy to exceed the standard, which is another topic.

But for formaldehyde, it is a good polymer material, such as phenolic resin, plywood and other materials will have more applications. Although it exists as a polymer component, inferior raw materials may contain more unreacted components or more unstable polymers, which are more likely to release formaldehyde. In this case, the release period will be longer, which may involve the continuous cracking and slow release of some polymers. In addition, the amount of composite materials and chemical synthetic materials in furniture decoration is increasing, which increases the potential source of formaldehyde release in disguise.

According to the above, it can be roughly concluded that formaldehyde is more harmful than benzene in indoor environment.

As for the treatment method, it can only be diluted by ventilation. See my other answer for details. Find a professional testing company to measure indoor formaldehyde 0.3mg/m3. How terrible is formaldehyde?