Background:

   When we focus on the formaldehyde problem in children's rooms, we realize that furniture, paints, wallpaper, toys, and other home building materials all pose the threat of excessive formaldehyde content. The harm of formaldehyde to the human body cannot be underestimated - mild cases can cause dizziness, allergic reactions and other adverse reactions, and massive inhalation can even cause death. Children, in particular, are the biggest victims of formaldehyde pollution exceeding standards.

  This indoor pollutant, known as the 'number one killer', what kind of harm does it actually cause to the human body?

1. The higher the formaldehyde concentration, the greater the harm to the body

      The national standard of the People's Republic of China 'Hygienic Standard for Formaldehyde in Indoor Air' stipulates that the maximum allowable concentration of formaldehyde in indoor air is 0.08 mg/m³. When the formaldehyde content in indoor air is 0.30 mg/m³, people can feel a peculiar smell and discomfort; at 0.50 mg/m³, it can irritate the eyes and cause tearing; at 0.60 mg/m³, it can cause throat discomfort or pain; higher concentrations can cause nausea, vomiting, coughing, chest tightness, asthma, and even pulmonary emphysema; when reaching 30 mg/m³, it can cause immediate death.

      So, if the formaldehyde concentration does not exceed the standard, is it absolutely safe? Experts remind consumers that even if the amount inhaled each time is very small, accumulation over time can lead to chronic poisoning, causing allergic dermatitis, skin irritation, mucous membrane congestion, pain in the fingertips of the nail bed, nail keratinization and fragility, as well as symptoms such as fatigue, insomnia, headache, palpitations, weight loss, autonomic nervous system disorders, and poor appetite.

2. Formaldehyde may cause allergies, gene mutations and other hazards

The harm of formaldehyde to the human body mainly occurs through the following effects:

      1. Irritating effect: Formaldehyde is a protoplasmic toxic substance that can bind with proteins. When inhaled at high concentrations, it causes severe respiratory tract irritation and edema, eye irritation, and headache.

      2. Sensitizing effect: Direct skin contact with formaldehyde can cause allergic dermatitis, pigmentation, and necrosis. Inhalation of high-concentration formaldehyde can induce bronchial asthma.

      3. Mutagenic effect: High-concentration formaldehyde is also a genotoxic substance. When laboratory animals inhale high concentrations in the laboratory, it can cause nasopharyngeal tumors.

     Formaldehyde exceeding standards can cause symptoms such as headache, dizziness, fatigue, nausea, vomiting, chest tightness, eye pain, sore throat, poor appetite, palpitations, insomnia, weight loss, decreased memory, and autonomic nervous system disorders in the human body; long-term inhalation by pregnant women may lead to fetal deformities or even death, and long-term inhalation by men can cause sperm deformities and death.

3. Children are the biggest victims of formaldehyde pollution exceeding standards

       According to expert analysis, among all groups, children are the biggest victims of formaldehyde pollution exceeding standards. There are several reasons: first, the molecular weight of formaldehyde is greater than the average weight of air, so formaldehyde mainly accumulates in the space range within 1 meter from the ground, which happens to be the main breathing zone for children. Compared to adults, children inhale harmful formaldehyde with higher probability and greater quantity; additionally, because children's body cells are more active and their metabolism is faster, even when resting, children's air intake is already twice that of adults, so children inhale much more formaldehyde than adults; finally, children's body functions are not yet fully developed and their resistance is lower, making them the most vulnerable targets for formaldehyde damage.

      According to epidemiological statistics, in China, the natural incidence rate of leukemia is approximately 4 in 100,000, with about 40,000 new leukemia patients each year, of which 50% are children. Although current evidence linking formaldehyde to leukemia is not conclusive, a children's hospital revealed that among more than 1,800 leukemia children treated at its hematology research institute over 10 years, 46.7% of the families had done renovations within six months before the onset of the disease. This shows that poor indoor air environment can cause direct harm to children's health.