Registration Dossier
Registration Dossier
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EC number: 268-220-1 | CAS number: 68037-96-7 This substance is identified by SDA Substance Name: C16-C18 and C18 unsaturated alkyl dimethyl amine and SDA Reporting Number: 11-040-00.
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Dissociation of DMA category members
The percentage of neutral (i.e. amine) and protonated forms of DMA category members can be calculated from the pKa of 9.78 (25 °C; identical for all category members)for a given pH using the Henderson-Hasselbach equation.
Percentage of neutral and protonated DMAs at pH 4, 7 and 9
pH |
% amine |
% protonated |
4 |
0.00017% |
99.99983% |
7 |
0.2% |
99.8% |
9 |
14.2% |
85.8% |
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