What is formaldehyde? Formaldehyde (HCHO) is a colorless and easily soluble irritating gas. Formaldehyde can be absorbed through the respiratory tract, and its aqueous solution "formalin" can be absorbed through the digestive tract.
Harmfulness of long-term exposure to low-dose formaldehyde: Formaldehyde has a strong carcinogenic and cancer-promoting effect. A large number of documents record that the effects of formaldehyde on human health are mainly manifested in abnormal smell, irritation, allergies, abnormal lung function, abnormal liver function and abnormal immune function. Its concentration reaches 0.06-0.07mg/cubic meter per cubic meter of air, and children will have mild asthma. When the indoor air content of formaldehyde is 0.1mg/m3, there will be peculiar smell and discomfort; when it reaches 0.5mg/m3, it can irritate the eyes and cause tearing; when it reaches 0.6mg/m3, it can cause throat discomfort or pain. When the concentration is higher, it can cause nausea and vomiting, cough, chest tightness, wheezing and even pulmonary edema; when it reaches 30mg/m3, it will cause immediate death.