Indoor formaldehyde volatilizes, is the humidity high or low?

The greater the humidity, the faster the indoor formaldehyde volatilizes.

Formaldehyde is easily soluble in water, and its release is also a dynamic equilibrium process. If the humidity in the environment changes, the release balance of formaldehyde will move. The higher the humidity, the faster formaldehyde will be released from the furniture and then dissolved in the water vapor in the air.

Generally, the formaldehyde content of newly renovated houses can exceed the standard by more than 6 times, and some may exceed the standard by more than 40 times. At the same time, the content of formaldehyde in indoor environment is closely related to the use time, temperature, humidity and ventilation of the house.

Generally speaking, the longer the house is used, the less formaldehyde remains in the indoor environment; The higher the temperature, the greater the humidity, which is more conducive to the release of formaldehyde; The better the ventilation condition, the faster the formaldehyde in building and decoration materials will be released.

Extended data

Relationship between formaldehyde volatilization and air temperature

The volatilization of formaldehyde is closely related to temperature. Generally speaking, the higher the temperature, the easier it is for formaldehyde in furniture to volatilize. The hot summer is the most "rampant" season for formaldehyde volatilization;

High temperature weather directly leads to indoor formaldehyde emission 20% to 30% higher than usual; Every time the room temperature rises 1℃, the formaldehyde volatilized from wooden furniture and floors will increase the formaldehyde concentration in indoor air by 0. 15-0.37 times.

An experiment shows that when the room temperature rises to 30℃ and the indoor relative humidity is 45%, the formaldehyde emission concentration in the air is 0.223 mg/m3, which is 2.23 times higher than the national indoor air quality standard. When the room temperature rises to 34℃ and the relative humidity is 50%, the formaldehyde emission concentration exceeds the standard by 5.53 times.

In this environment, people will feel stinging eyes and itchy throat, just like being in a closed room sprayed with pesticides.