Registration Dossier
Registration Dossier
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EC number: 458-890-5 | CAS number: 2138848-94-7
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Adequacy of study:
- other information
Data source
Reference
- Reference Type:
- other: Body responsible for the test
- Title:
- Unnamed
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Principles of method if other than guideline:
- Based on OECD Guidelines for Testing of Chemicals (Section 1
No 112).
The pKa was investigated spectrophotometrically using a
dilute aqueous mixed buffer solution of the test substance
S191820, ASG 10348537. The pH of the test solutions was
adjusted using potassium hydroxide and hydrochloric acid.
A UV/Visible spectrum was obtained at each pH value.
The ionic strength of the solution was maintained at a
constant level by the addition of potassium chloride
(0.15M).
Instrument Details :
Orion EA 940 pH Meter
Perkin Elmer Lambda 900 UV Spectrophotometer
(1cm silica cells, slit width 2.0nm, data interval 1.0nm,
integration time 0.08s)
Results and discussion
Any other information on results incl. tables
pKa 1 :11.0
pKa 2 :2.0
All pKa values measured at ambient temperature 23ºC
Applicant's summary and conclusion
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