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Hydrogen bromide (HBr) has an estimated log octanol/water partition coefficient of 0.6287 (Annex VII Section 7.8), so it has a low potential for adsorption. HBr in contact with water forms hydrobromic acid, which dissociates into hydrogen and bromide ions. Thus, adsorption of HBr itself is unlikely. 

Bromide, the primary degradant, occurs naturally in the environment. Negative anions such as bromide are known not to sorb to soil and bromide has been used to monitor ground water flow through soil as it is not known to significantly sorb to soil.


Henry’s Law Constant

Brimblecombe, P., and Clegg, S.L. (1998) reported a Henry's law constant of hydrobromic acid = 1.32 x 109mol2 kg-2 atm-1at 25 ºC.