Formaldehyde is a sensitizing agent that can cause an immune system response upon initial exposure.

Acute exposure is highly irritating to the eyes, nose, and throat and can make anyone exposed cough and wheeze. Subsequent exposure may cause severe allergic reactions of the skin, eyes and respiratory tract and can cause asthma-like respiratory problems and skin irritation such as dermatitis and itching. Formaldehyde is classified as Group 1 carcinogen by the IARC, meaning it is carcinogenic to humans (nose-cancer).

References: NIOSH,, CDC, CCOHS

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