Tribromoisocyanuric acid (C3Br3N3O3) is a chemical compound used as a reagent for bromination in organic synthesis.A New Regioselective Bromination of Activated Aromatic Rings, Almeida, L. S. de; Esteves, P. M.; Mattos, M. C. S. Synthesis 2006, No 2, 221-223. DOI: 10.1055/s-2005-918511 (https://www.thieme-connect.com/products/ejournals/html/10.1055/s-2005-918511) It is a white crystalline powder with a strong bromine odour. It is similar to trichloroisocyanuric acid.

Uses Tribromoisocyanuric acid is used for the bromination of aromatics and alkenes.

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