It still works. Like decoration odors, there will be great changes after treatment. This can also be experienced personally.
Formaldehyde is an organic chemical substance with a chemical formula of HCHO or CHO and a molecular weight of 30.03. It is also called formic aldehyde. It is a colorless and irritating gas that can irritate human eyes and nose. The relative density of gas is 1.067 (air=1), and the density of liquid is 0.815g/cm? (-20℃). Melting point -92℃, boiling point -19.5℃. Easily soluble in water and ethanol. The concentration of the aqueous solution can reach up to 55, usually 35-40, usually 37, and is called formaldehyde water, commonly known as formalin.
It can be produced by dehydrogenation or oxidation of methanol under the catalysis of silver, copper and other metals, and can also be separated from the oxidation products of hydrocarbons. It can be used as raw material for phenolic resin, urea-formaldehyde resin, vinylon, methenamine, pentaerythritol, dyes, pesticides and disinfectants. Industrial formaldehyde solution generally contains 37% formaldehyde and 15% methanol, used as polymerization inhibitor, with a boiling point of 101°C.