Cancer: IARC carcinogens comments: positive animals; humans are not clear. Metabolism and degradation: The main source of environmental pollution formaldehyde in organic synthesis, chemical, synthetic fibers, dyes, paints and wood processing industries discharge waste water, gas and so on. Degradation of certain organic compounds also produce formaldehyde in the environment, such as degradation products of vinyl chloride also contains formaldehyde. Since formaldehyde has a strong reduction, with oxidizing substances in the presence of conditions, can be oxidized to formic acid. Such as access to water in the environment may be saprophytes formaldehyde oxidation and decomposition, which can consume dissolved oxygen in water. Further formic acid decomposition products carbon dioxide and water. Formaldehyde into the environment under the combined effect of physical, chemical and biological, and was gradually diluted oxidation and degradation. Oxidative degradation of formaldehyde as follows: 2HCHO + O2 --- 2HCOOH2HCOOH + O2 --- 2H2O + 2CO2 residues and accumulation: records, the formaldehyde content of the soil adsorption zone industrial enterprises up to 180-720mg / kg dry soil. Contaminated soil can lead to groundwater contamination, the formaldehyde content in the water can be 10-20 times higher than the topsoil. Formaldehyde is quite stable in the environment, when the concentration of formaldehyde in water 5mg / L when (20 ℃) ??food microbiology bacteria, observations show that can be kept constant within 5 days. Water and formaldehyde concentration <20mg / L, the aeration tank can be domesticated microbial degradation of digestion. The content of 100mg / L when food microbiology examination, can inhibit the microbial oxidation of organic matter. When the formaldehyde content of the water is 500mg / L, biological oxygen process all suspended microorganisms in water are killed. Formaldehyde is a colorless soluble irritant gas, can not detect lower concentrations. [Harm] long-term exposure to low doses of formaldehyde can cause chronic respiratory diseases, menstrual disorder, pregnancy syndrome, caused by nasopharyngeal cancer, caused by lower neonatal body, chromosomal abnormalities, and even lead to child leukemia. High concentrations of formaldehyde on the nervous system, immune system, liver and others have poisoned. Meanwhile, formaldehyde also teratogenic and carcinogenic. 2, benzene is highly toxic carcinogen by IARC confirmed benzene slightly fragrant, easily overlooked food microbiology CMA report, can cause leukemia and aplastic anemia. [Harm] long-term inhalation of benzene, can cause chronic poisoning of the human hematopoietic system, nervous system damage, cause aplastic anemia or leukemia. Benzene greater harm to women, women of childbearing age long-term inhalation of benzene can cause menstrual disorders, pregnancy complications, fetal congenital defects. 3. Ammonia is a colorless gas with a strong pungent odor, can not detect low concentrations. [Harm] ammonia contact the organization have corrosion and irritation. Organization can absorb moisture, so that tissue protein denaturation, changes in membrane structure. Usually in the form of ammonia gas is inhaled. After inhalation of low concentrations of ammonia, there may be tears, sore throat, chest tightness, difficulty breathing, accompanied by dizziness, headache, nausea, vomiting, fatigue and other phenomena. Higher concentrations of ammonia into the alveoli, can enter the bloodstream through the alveoli, combined with hemoglobin, oxygen transport function destruction. Lead to pulmonary edema, embolism, and even can cause cardiac arrest. 4, TVOC composed of extremely complex food microbiology, is a comprehensive variety of toxic gases. Mainly from a variety of coatings, adhesives and various artificial materials. TVOC may have odor, showing toxicity, irritation, and some compounds are genotoxic. General indoor air pollution, mostly renovated TVOC pollution. [Harm] TVOC can cause the level of immune disorders affecting the central nervous system function, dizziness, headache, drowsiness, weakness, chest tightness and other symptoms, may also affect the digestive system, loss of appetite, nausea, severe liver damage or even and hematopoietic systems, and other allergic reactions occur. Food Microbiology inspection | food microbiology | environmental protection provided by Chuzhou Green Ribbon Green Ribbon Indoor Environmental Services Limited. Chuzhou Green Ribbon Indoor Environmental Services Ltd. (www.lsd5188.com) strong, credible, Chuzhou, Anhui environmental projects in collaboration industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the green ribbon into the brilliant green and you work for a better future!