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What is HCHO in air quality?

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What is HCHO in air quality?

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Answer: Formaldehyde is an organic air pollutant containing one atom of carbon, one atom of oxygen and two atoms of hydrogen. It has the chemical formula HCHO or CH2O. Formaldehyde is present in outdoor air but indoor air formaldehyde concentrations are usually much higher because of indoor formaldehyde sources.

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