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Table 1 Distribution of the forms of adipic acid at different pH values

From: Adipic acid tolerance screening for potential adipic acid production hosts

Form Structure Amount (%)a
pH 4 pH 5 pH 6 pH 7
Undissociated 70.7 15.2 0.5 0.0
Semi-dissociated 28.2 60.6 20.0 2.5
Dissociated 1.1 24.1 79.5 97.5
  1. aAmounts of the three forms of adipic acid was calculated using the Henderson–Hasselbalch equation: pH = pKa + log10([A]/[HA]). The pKa values, pKa1 = 4.4 and pKa2 = 5.4, are from Pubchem