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PCP (pentachlorophenol) is classified as carcinogenic, mutagenic and toxic for reproduction. It was used for a long time in wood preservatives (WP / HSM) (also indoors). Since 1978 there has been a labelling obligation and a ban on its use in indoor areas. PCP diffuses out of treated wood (= primary source) for a long time and thus leads to pollution of the indoor air, through which it then attaches itself to other organic materials such as house dust (= secondary source). PCP decomposes only very slowly. Therefore, in the case of remediation, possible secondary sources must always be considered in addition to the primary source.


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