Where is the formaldehyde in the home of the invisible killer looking for life?
Shortly after moving into his newly renovated home, Mr. Zhao was eager to place the new mattress he had just purchased in his bedroom. However, soon after, he noticed that the strong, pungent odor in the house became even worse. Concerned about the air quality, he sent a sample of the air to a professional testing agency. The results were alarming — the formaldehyde level was more than ten times higher than the safe limit.
Formaldehyde is a toxic chemical classified by the World Health Organization as a carcinogen and teratogen, known to cause allergies and irritate the eyes and nose. It is a colorless gas with a sharp, pungent smell and is highly volatile at room temperature. Due to its low boiling point, it easily evaporates into the air, often appearing as an aqueous solution. But where exactly does this harmful substance come from in our daily lives?
1. Many interior decoration materials contain formaldehyde, such as plywood, blockboard, medium density fiberboard, and particle board. These artificial boards use urea-formaldehyde resin as an adhesive, which releases formaldehyde over time. This substance not only improves adhesion but also increases the hardness and durability of the material, making it a common choice in construction.
2. Furniture made from these same materials can also be a major source of formaldehyde. Some manufacturers cut corners by using substandard boards or improper production methods, turning their products into sources of indoor pollution.
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3. Other decorative materials, like white latex, foam plastics, and paints, may also contain formaldehyde. These substances are often used in wall coatings and insulation, contributing to indoor air pollution.
4. Textiles used in home decoration, such as bedding, curtains, carpets, and fabric furniture, can also release formaldehyde. During the manufacturing process, some chemicals containing formaldehyde are added to improve wrinkle resistance, water repellency, and flame retardancy. Over time, these substances gradually emit into the air, affecting indoor air quality.
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