2,7-Dinitrodibenzo-p-dioxin ,its cas register number is 71400-33-4. It also can be called 2,7-Dinitrodibenzo(b,e)(1,4)dioxin ; Dibenzo-p-dioxin, 2,7-dinitro- ; and Dibenzo(b,e)(1,4)dioxin, 2,7-dinitro- .