Is the taste of photographic film poisonous?

Formaldehyde is a colorless gas with a strong pungent smell. Soluble in water and aqueous solution. Soluble in water and ethanol, alcohol and ether. Formaldehyde is gaseous at room temperature. Usually, 35 ~ 40% aqueous formaldehyde solution is called formalin. Phenolic resin (bakelite) was obtained by polycondensation of aldehyde groups in formaldehyde molecules. Formaldehyde is an important organic raw material, which is mainly used in plastic industry (such as phenolic resin, urea-formaldehyde plastic-electric jade), synthetic fiber (such as synthetic vinylon-polyvinyl formal), leather industry, medicine, dyes and so on.

Second, what harm does formaldehyde do to human body?

1) irritation: the main harm of formaldehyde is the irritation to skin and mucosa. Formaldehyde is a toxic substance in protoplasm, which can combine with protein. When inhaled in high concentration, it will cause severe respiratory irritation and edema, eye irritation and headache.

2) Sensitization: Direct skin contact with formaldehyde can cause allergic dermatitis, pigmentation and necrosis, and inhalation of high concentration formaldehyde can induce bronchial asthma.

3) Mutagenesis: High concentration of formaldehyde is still a genotoxic substance. Experimental animals can cause nasopharyngeal tumors under the condition of high concentration inhalation in laboratory.

4) Outstanding manifestations: headache, dizziness, fatigue, nausea, vomiting, chest tightness, eye pain, sore throat, loss of appetite, palpitation, insomnia, weight loss, memory loss and autonomic nervous disorder; Long-term inhalation by pregnant women may lead to fetal malformation or even death, while long-term inhalation by men may lead to male sperm malformation or even death.

Third, what harmful gases will be produced by the renovation of new houses? Where do these harmful gases come from?

The main harmful gases produced in the renovation of new houses are formaldehyde, benzene, ammonia, radon, TVOC and other harmful gases.

The harmful gases produced by the renovation of new houses mainly come from the paints and coatings used in the renovation process and the furniture purchased. Because formaldehyde is widely used in industry, it is used in synthetic resin, surfactant, plastic, rubber, leather, paper, dye, medicine, pesticide, photographic film, explosives, building materials, disinfection, fumigation and anticorrosion.

4. What are the effective ways to deodorize in addition to formaldehyde in new house decoration?

1) ventilation mode. By changing the natural circulation of indoor air, harmful gases in the room are taken away and diluted. This can be achieved by opening doors and windows or using an exhaust fan. This method is the most primitive, the longest and the most useful.

2) Plant removal method. Such plants are: chlorophytum, saxifragon, ivy, aloe, agave and gerbera. These plants not only play the role of decoration and embellishment at home, but also play the role of purifying the air.

3) Activated carbon adsorption method. Using activated carbon and bamboo charcoal with adsorption function to remove these harmful gases is also the most widely used method at present. However, there is a disadvantage that the amount of activated carbon is proportional to the space area, and the larger the space, the greater the amount.

4) formaldehyde scavenger removal method. This method is the most direct and effective, but the requirements for products are also very professional. At present, such products include chemical products, nano-photocatalyst, in addition to formaldehyde products of plant stock solution, etc. This kind of product will have some "secondary pollution", so it should be used with caution.

5) indigenous law. 300 grams of black tea is soaked in two basins of hot tea, put into the living room, and open the window for ventilation. In addition, you can put some grapefruit peel, orange peel, pineapple and so on indoors. These things have a certain effect.