dioxinn.

1919 Chem. Abstr.: Decennial Index I–X 2841/2 Dioxin.

1939 Jrnl. Amer. Chem. Soc. 61 3020/1 Dioxadiene, although hitherto unknown, has long been listed in chemical abstracts under the name of Dioxin. It is used as the fundamental or parent nucleus for the cataloging of dioxane, dioxene, and their derivatives.

1970 New Yorker 14 Mar. 124/3 Extensive teratogenic, or fetus-deforming, effects were discovered in chick embryos when the dioxin, or a distillate predominantly consisting of it, was present at concentrations of little more than a trillionth of a gram per gram of the egg.

1970 Kirk-Othmer Encycl. Chem. Technol. (ed. 2) XXII. 180 Dioxins, including 2,3,7,8-tetrachlorodibenzo-p-dioxin, have been detected as contaminants in samples of 2,4,5-T.

1974 Sci. Amer. Apr. 50/1 The committee found no hard evidence of human illness or of congenital malformations attributable to the herbicides, although 2,4,5-T in particular, and its contaminant, dioxin, have been seriously implicated in animal studies.

1976 Nature 19 Aug. 637/1 The dioxin TCDD is a contaminant present in 2,4,5-T at levels variously estimated at between 0.07 and 50 p.p.m.

1978 Price's Textbk. Pract. Med. (ed. 12) iii. 284/2 Under conditions of high reaction temperatures in the manufacture of 2,4,5-T there has been formed tetrachlorodibenzoparadioxine (dioxine) which has produced chloracne in laboratory workers.

1980 Science 24 Oct. 386/2 The term chlorinated dibenzo-p-dioxins, or more simply chlorinated dioxins, refers to 75 compounds or any combination of the 75.

1986 St. Louis (Missouri) Post-Dispatch 28 May 7 a/3 The Illinois court reversed a multi-million-dollar verdict in a suit over a spill of dioxin in Sturgeon, Mo.