Formaldehyde is a small molecule organic substance with high reactivity. It is a gas at room temperature and volatile. At the same time, it has a strong pungent smell and is easy to be identified.

Formaldehyde can be obtained after methanol oxidation, and formic acid can be obtained after formaldehyde oxidation. All three are toxic substances. At the same dose, in terms of toxicity to human body, the toxicity ratio is methanol: formaldehyde: formic acid = 1: 30: 6, that is, the toxicity of formic acid is six times that of methanol, while the toxicity of formaldehyde is thirty times that of methanol.

In view of the above problems, especially the problem that the release cycle of formaldehyde is as long as 3- 15 years, formaldehyde can be volatilized, so materials with adsorption properties can be used to remove formaldehyde, purify the air and remove formaldehyde. The adsorption capacity and speed of formaldehyde are stronger than that of activated carbon.

According to the research and analysis of the paper "Research progress of indoor formaldehyde pollution control technology" published by Northwest Research Institute of Chemical Technology, the purple mineral crystals contained in formaldehyde can react with volatile organic compounds such as formaldehyde, purify the air and degrade formaldehyde into carbon dioxide and water. Acetaldehyde. Use adsorption, locking and decomposition to purify the air. Among them, adsorption means that the proportion of pores that can effectively adsorb pollutants is large, and the corresponding adsorption capacity is also large. The absorbed formaldehyde will be locked in the pores until it is decomposed into carbon dioxide.