Expert studies show that there are more than 500 kinds of volatile organic compounds in indoor air, where there are more than 20 kinds of carcinogens, more than 200 kinds of pathogenic viruses. Harmful are: formaldehyde, benzene, radon, ammonia and esters, such as trichlorethylene. Now the national standard "civil engineering indoor environmental pollution control norms" (GB-50325-2001) in the five control pollutants on human health hazards as outlined below: Formaldehyde is a colorless soluble irritant gases. Particleboard, MDF, plywood and other artificial board, adhesives and wallpaper are the main source of formaldehyde in the air, the release of up to 3 to 15 years. Can be absorbed through the respiratory tract, the health hazards of formaldehyde on a long-term, latent, hidden features. Long-term inhalation of formaldehyde can cause nasopharyngeal, laryngeal cancer and other serious illnesses. The radionuclide content in building materials shall comply with the relevant provisions of, or make indoor radiation dose rate increased Dang formaldehyde detection governance institutions, the indoor radon concentration. To try to use this property of materials. For real estate outside the building material to see whether after a radioactive test Dang formaldehyde detection governance, is a Class A (for interior decoration), Class B (available but there are certain radioactive, people do not often available in indoor public places), or C categories of products (for outdoor decoration) Dang formaldehyde detection CMA certification, and then determine its purpose. Building materials should be carried out at the factory radioactive test. In general, Jiangxi, Zhejiang, Anhui some local production of stone coal cinder brick or brick, which uranium, radium, thorium content is high, the use of special attention. Also pay attention to the choice of natural stone. Not all natural stone radionuclide concentrations are high and can not be used as building materials, natural stone, but some choose to pay attention. In general, magmatic rocks of acid intrusive rocks, such as granite Dang formaldehyde detection method of governance, high radioactive content. Clastic sedimentary rocks of sedimentary rocks, such as shale, radioactive content is also higher than other stone. Granite and shale are not suitable for indoor use as building materials, especially suitable for use as bedroom interior decoration materials. Dang formaldehyde testing treatment agent, CMA qualification (certified), Dang formaldehyde detection control provided by Chuzhou Green Ribbon Indoor Environmental Services Limited. Chuzhou Green Ribbon Indoor Environmental Services Ltd. (www.lsd5188.com) is a leader in Chuzhou, Environment Projects, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the Green Ribbon environmental leadership with the staff warmly welcome all inquiries negotiations to create a better environment green ribbon future.