What are the most volatile organotin chemicals?

What are the most volatile organotin chemicals?

Total volatile organic compound (total volatile organic compound, TVOC), in a broad sense, any liquid or solid at room temperature and pressure naturally volatile organic compounds should be the total volatile organic compound (TVOC). TVOC in the "indoor environmental pollution control code for civil construction projects" refers to the total amount of volatile organic compounds measured in the material or air under specified test conditions.

TVOCs are extremely complex as heterogeneous pollutants in indoor air, and new species are constantly being synthesized. In addition to aldehydes, TVOCs are commonly found in benzene, toluene, xylene, trichloroethylene, trichloromethane, naphthalene, diisocyanates, etc., and are mainly derived from various paints, adhesives and various man-made materials. What are the classification and sources of volatile organic pollutants (VOCs) in the indoor environment? Volatile organic pollutants are divided into four categories: very volatile organic compounds (VVOCs), volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs) and organic matter related to particulate matter or particulate organic matter (POM), and in the detection of indoor organic pollutants basically VOCs to represent the organic pollution status. 1989 the U.S. Environmental Protection Agency layer detected More than 900 in the presence of indoor VOCs.

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The sources of VOCs in the indoor environment are mainly released from building materials, cleaning agents, paints, water-based paints, adhesives, cosmetics and detergents, in addition to smoking and cooking processes. The common indoor VOCs listed in the 1984 WHO Consensus on Concerns about Indoor Air Pollutants report are listed in the table below: Pollutant Source Formaldehyde Pesticides, manufactured pressboard products, urea-formaldehyde foam insulation (UFFI), hardwood plywood, adhesives, particle board, laminates, paints, plastics, carpets, upholstered furniture covers gypsum board, joint compounds, ceiling tiles and siding, non-latex inlay compounds, acid-cured wood coatings, wood siding, plastic/ melamine siding, vinyl (plastic) floor tiles, parquet flooring benzene indoor burning tobacco smoke, solvents, paints, stains, varnishes, graphic facsimiles, computer terminals and printers, joint compounds, latex inlays, water-based adhesives, wood siding, carpeting Floor tile adhesives, stains/textile cleaners, polystyrene foams, plastics, synthetic fibers Benzene Smoke from burning tobacco indoors, solvents, paints, stains, varnishes, graphic fax machines, computer terminals and printers, bonding compounds, latex grouts, water-based adhesives, wood siding, carpeting, floor tile adhesives, stains/textile cleaners, polystyrene foams, plastics, synthetic fibers Carbon tetrachloride solvents, refrigerants, aerosols, fire extinguishers, grease solvents Trichloroethylene solvents, dry-cleaned fabrics, upholstery covers, inks, paints, lacquers, varnishes, adhesives, fax machines, computer terminals and printers, typewriter correction fluid, paint removers, stain removers Tetrachloroethylene dry-cleaned fabrics, upholstery covers, stain/textile cleaners, fax machines, computer terminals and Chloroform Solvents, dyes, pesticides, fax machines, computer terminals and printers, upholstery cushions, chloroform water 1,2-dichlorobenzene Dry cleaning additive, degreaser, insecticide, carpet 1.3-dichlorobenzene Insecticide 1,4-dichlorobenzene Deodorizer, mildew inhibitor, air freshener/deodorizer, toilet and waste bin deodorizer, insecticide pills and tablets Ethylbenzene Styrene-related Finished products, synthetic polymers, solvents, graphic facsimiles, computer terminals and printers, polyurethane, furniture polishes, jointing compounds, latex and non-latex jointing compounds, floor tile adhesives, carpet adhesives, varnished hardwood parquet Toluene Solvents, perfumes, detergents, dyes, water-based adhesives, edge sealers, molding tapes, wallpaper, jointing compounds, silicate laminates, vinyl (plastic) coated wallpaper, jointing compounds, paints, carpets, pressed wood trim, vinyl (plastic) floor tiles, paints (latex and solvent-based), carpet adhesives, grease solvents xylene solvents, dyes, insecticides, polyester fibers, adhesives, jointing compounds, wallpaper, jointing compounds, varnishes, resin and ceramic paints, carpets, wet-finish photocopiers, pressed board products, gypsum boards, water-based adhesives, grease solvents What are the hazards of volatile organic pollutants (VOCs) in the indoor environment?

Indoor organic pollutant contamination of the human body can basically be divided into three main types: gas and other sensory effects (such as irritation), mucosal irritation and other systemic toxicity resulting in lesions, genotoxicity and carcinogenicity. Studies have shown that exposure to high concentrations of volatile organic pollutants in the work environment can lead to poisoning of the human central nervous system, liver, kidneys and blood, and individual allergic persons can have serious reactions even at low concentrations, usually showing symptoms such as: 1) eye discomfort, feeling red hot, dry, sandy eyes, tearing; 2) throat discomfort, feeling dry throat; 3) breathing problems, shortness of breath, bronchial asthma. 4) headache, difficulty in concentration, dizziness, fatigue, irritability, etc. Since there is no comprehensive understanding of various volatile pollutants and their toxicity and effects on the senses, avoidance should be the main focus from a general point of view.

Measures to prevent and control TVOC From the control of pollution sources: (1) the project should be used to meet national standards and less polluting decoration materials, which is the fundamental measure to reduce the content of volatile organic compounds in indoor air. For example, the use of coatings and adhesives that meet the requirements of environmental indicators, the use of non-polluting or less polluting water-based materials, while paying attention to the choice of adhesives. (2) the choice of construction process. In painting and waterproofing, the construction process is not standardized, can make the benzene content in indoor air is greatly increased. Eliminate indoor air pollution, the most effective way is ventilation, open the windows when the outdoor air is good ventilation, conducive to indoor harmful gas emission and discharge.

For closed spaces that rely on air conditioning systems, the air conditioning system must be improved to ensure the amount of fresh air and air exchange. Use of air purification devices: Indoor air purifiers and air exchange devices that are effective can be used to keep the indoor air purified, which is a proven way to remove harmful indoor gases.