Registration Dossier
Registration Dossier
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EC number: 913-888-8 | CAS number: -
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
Ammonia : pKa = 9.25 ; ( t = 25°C)
Phosphoric acid : pKa1 = 2.16; pKa2 = 7.21; pKa3 = 12.32 ; ( t=25°C)
Key value for chemical safety assessment
Additional information
The liquid form of the multiconstituent substance dissociates into water in ammonium and phosphoric acid which pKa
are described below:
- Ammonia : pKa =9.25; ( t =25°C)
- Phosphoric acid : pKa1 =2.16; pKa2 =7.21;pKa3 =12.32; ( t=25°C)
Considering the pH of the solution (between 5 and 6), these values confirm that the associated salts are totally dissociated in the liquid phase.
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