Registration Dossier
Registration Dossier
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EC number: 619-057-3 | CAS number: 94667-33-1
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Data waiving:
- other justification
- Justification for data waiving:
- other:
Reference
Description of key information
Tetra-alkylammonium salts are therefore completely ionised at all concentrations and hence no dissociation constant values have yet been assigned to them. Examination of the structural formula establishes that N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate is irreversibly ionised and therefore the determination of the dissociation constant is not applicable. Thus, it is considered that determination of the dissociation constant of N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate is not required.
Key value for chemical safety assessment
Additional information
N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate is a polar quaternary alkyl ammonium compound and as such, it is already a fully dissociated molecule. Tetra-alkylammonium salts are therefore completely ionised at all concentrations and hence no dissociation constant values have yet been assigned to them (Albert and Serjeant, Ionization Constants of Acids and Bases, p138, pub. Methuen & Co. Ltd. 1962). Examination of the structural formula establishes that N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate is irreversibly ionised and therefore the determination of the dissociation constant is not applicable. Thus, it is considered that determination of the dissociation constant of N,N-Didecyl-N-methyl-poly(oxyethyl)ammonium Propionate is not required.
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