Methylene Blue Protonation States and pKa Values
Diagram illustrating the acid-base equilibria of methylene blue (MB), displaying its various protonated and deprotonated forms (MBH₃²⁺, MBH₂⁺, MBH, MB, MB⁻) with associated pKa values of 2.6 and 11.2, and the isoelectric point (IEP) at 8.33.
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