Bis­(2-hy­droxy­eth­yl)ammonium 2-bromo­phenolate

In the crystal structure of the 1:1 title salt, C₄H₁₂NO₂⁺·C₆H₄BrO⁻, hydrogen-bonding inter­actions originate from the ammonium cation, which adopts a syn conformation. A gauche relationship between the C—O and C—N bonds of the 2-hy­droxy­ethyl fragments also facilitates O—H...O inter­actions of bis­(2-hy­droxy­eth­yl)ammonium cation chains to phenolate O atoms. The resulting double-ion chains along [100] are further linked by N—H...O inter­actions, forming chains parallel to [110].