Interior decoration which includes home decoration, office decoration, decoration of public places, they have produced a variety of harmful substances, including the greatest harm to the human body, there are four substances are: formaldehyde, benzene, TVOC, ammonia. These harmful substances for children, the elderly and the immune system is less than some ordinary people who are more susceptible to these injuries hazardous substances. Four indoor environment of hazardous substances as follows: formaldehyde: it is a carcinogen by the World Health Organization identified, there is a strong pungent odor. Mainly artificial board, adhesives, paint and other decoration materials, the release of the longest 15 years. It stimulates the human eye and respiratory mucosa, causing the body's immune dysfunction, liver and lung damage, but also affect the body's central nervous system, is easy to miscarriage and fetal malformation. Benzene: It is a gas with a faint scent, mainly in adhesives, paint and other decoration materials belonging potent carcinogens. If a person in a short time to absorb high concentrations of benzene, there will be symptoms of central nervous system anesthesia. Who will be a slight dizziness, headache, nausea, fatigue, confusion, severe respiratory and circulatory failure, coma and even death. If the long-term inhalation of benzene can cause the body's aplastic anemia, and even develop into leukemia. TVOC: It is a general term for all possible indoor volatile organic objects exist in artificial board, paint, carpet and other decoration materials. TVOC levels can cause the body's immune disorders affecting the central nervous system function. If a prolonged stay in the TVOC excessive indoor environment, make people dizziness, headache, drowsiness and other symptoms, may also affect the digestive system, loss of appetite, nausea and other symptoms, severe liver damage and hematopoietic systems. Ammonia: It is an irritant gas with a strong odor. Mainly stored in adhesives, human metabolites, antifreeze and other objects, and it is easily attached to the body's skin, mucous membranes and conjunctiva, thus making the inflammation, weaken the body's resistance, weepy, sore throat, breathing difficulties and other symptoms, severe pulmonary edema. Wuxi square construction qualification testing company in the "scientific method, the data is accurate, precise and efficient, fair and honest" approach to serious serious working attitude and strict system of organization and management and improve the efficiency of the quality assurance system, to provide you with the most accurate data, the most authoritative conclusions of the examination and the best quality service.