Can infants stay in an environment with formaldehyde levels of 0.04 mg/m³?

Generally speaking, when the indoor formaldehyde concentration is 0.04 mg/m³, it is acceptable for infants to reside temporarily, but long-term residence is not recommended. Detailed analysis is as follows:

China has clearly stipulated standards for indoor air formaldehyde concentration, specifying that formaldehyde levels should not exceed 0.08 mg/m³. Although a concentration of 0.04 mg/m³ is relatively low, formaldehyde's harmful effects can be long-lasting. While the current level may seem safe, prolonged exposure combined with infants' underdeveloped physiological functions and immune systems—which make them more sensitive to harmful substances like formaldehyde—means adverse effects cannot be completely ruled out. These effects may include mild respiratory irritation, skin allergies, or potential impacts on immune system development. Additionally, other indoor pollutants may interact with formaldehyde, potentially increasing health risks.

It is recommended to regularly open windows for ventilation in daily life to maintain indoor air circulation and help reduce formaldehyde levels.