"2,3,7,8-tetrachlorodibenzo[b,e][1,4]dioxin"@en . "2,3,7,8-tetrachlorodibenzo[b,e][1,4]dioxin — CAS Identifier: 1746-01-6"@en . "CAS:1746-01-6" . "2,3,7,8 TCDD"@it . "2,3,7,8 TCDD — Codice CAS: 1746-01-6"@it . . . . . .