Photodecomposition of Chlorinated Dibenzo-p-Dioxins

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Science  20 Aug 1971:
Vol. 173, Issue 3998, pp. 748-749
DOI: 10.1126/science.173.3998.748


The toxic herbicide impurity 2,3,7,8-tetrachlorodibenzo-p-dioxin and its homologs decomposed rapidly in alcohol solution under artificial light and natural sunlight, the rate of decomposition depending upon the degree of chlorination. However, photodecomposition was negligible in aqueous suspensions and on wet or dry soil.