Registration Dossier
Registration Dossier
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EC number: 477-690-9 | CAS number: 874819-71-3
Dissociation constant
Administrative data
Link to relevant study record(s)
Description of key information
A study was performed in order to determine the dissociation constant of N-(2-nitrophenyl)phosphoric triamide (2-NPT).
The determination was performed in triplicate.
A three-point-calibration was performed using three standard-buffer-solutions (pH 4.01, 7.00 and 9.21).
Titration was performed using HCl concentration 0.001 mol/L; turning-point was detected electrometrically.
The pKa was determined as 5.670 ± 0.124 and the pKb was determined as 8.330 ± 0.124 these values are the mean of three independent determinations ± their standard deviation.
Key value for chemical safety assessment
- pKa at 20°C:
- 5.67
Additional information
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