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and cancer promotion. Formaldehyde on human health effects mainly in the sense of smell abnormalities, irritation, allergies, lung dysfunction, abnormal liver function and immune dysfunction and so on. Its concentration in the air per cubic meter to 0.06-0.07mg m3, the children will be mild asthma. When the indoor air formaldehyde content of 0.1mg m3, there is odor and discomfort; to 0.5mg m3, can irritate the eyes, causing tears; to 0.6mg m3, can cause discomfort or pain in the throat. Concentration

higher, can cause nausea and vomiting, cough, chest tightness, asthma or pulmonary edema; to 30mg m3, it will immediately cause death. 2, long-term exposure to low doses of formaldehyde can cause chronic respiratory disease, causing nasopharyngeal carcinoma, colon cancer, brain tumors, menstrual disorders, nuclear mutation, DNA single-stranded cross-linked and DNA and protein cross-linking and inhibition of DNA damage repair , Pregnancy syndrome, caused by neonatal chromosomal abnormalities,

leukemia, caused by adolescent memory and mental decline. In all contacts, children and pregnant women are particularly sensitive to formaldehyde, the harm is even greater. According to relevant statistics: 70% of human diseases and indoor environment, China each year 120,000 people died of indoor pollution, more than 90% of children with leukemia are admitted to the newly renovated room within a year of illness. 3, the pore size of its internal pores in the 0.27-0.98 nm between the crystal arrangement.
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