Prepd by mixing bromine and selenium in the correct proportions: Schneider, Pogg. Ann. 128, 327 (1866); 129, 450, 634 (1866); by treating selenium dioxide with hydrobromic acid: Lenher, Kao, J. Am. Chem. Soc. 47, 772 (1925).
This monograph has been retired and is no longer subject to revision or update.