Because natural stone material quantity is limited, price is higher, in household is decorated, often can use a large number of artificial stone material. Among them, adhesion material mostly contains a variety of organic solvents and formaldehyde, will also become an important indoor pollution source.
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Indoor formaldehyde safety standards are lower than 100 micrograms per cubic meter, according to the world health organization, according to documents in 6000 completed a year in China, home to check median unexpectedly found formaldehyde concentration is 238 micrograms per cubic meter, means that more than half of the new house decorate, formaldehyde concentration exceed standard of more than two times.
Recently, xiong Lin, CEO of liberty, said in a statement on weibo that in response to the doubts about liberty, all of the first rental housing inventory was removed from the shelves on September 1, and promised that all test reports would be put online and then rented. However, xiong Lin also said that the problem of excessive formaldehyde may have a lot of tableland reasons. For example, the detection is qualified when people live in the autumn, and the next summer, the unit emissions of formaldehyde will rise again due to the indoor closure and rising temperature.
To this, also have expert to think, comfortable "grievance" is not unreasonable. "The spread of the free house tenant who was diagnosed with leukemia shortly after he checked in and attributed it to a formaldehyde problem, which is, in this sense, 'wronged' formaldehyde." Tableland, September 9, a researcher at the Chinese academy of medical sciences and peking union medical college of science and technology daily reporters chen-guang wang, ph.D., professor, "the research shows that even formaldehyde likely causes leukaemia, but is not the only induce tableland, not to mention tumorigenesis is a long process, short-term opportunity to contact that causes leukaemia and even can be neglected."
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Similarly, the university of pennsylvania school of medicine, an associate professor at hong-tao zhang also believes that although the world health organization's international agency for research on cancer (iarc) has classified formaldehyde category 1 carcinogen, but the results can only prove that formaldehyde can increase the risk of leukemia, the available evidence also can't confirm the causation of formaldehyde and leukemia, further studies are needed.