Registration Dossier
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EC number: 500-236-9 | CAS number: 68920-66-1 1 - 2.5 moles ethoxylated
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-05-27 to 2010-06-01
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 112 (Dissociation Constants in Water)
- Principles of method if other than guideline:
- Dissociation constant in water was determined at 20 °C by using the conductometric method.
- GLP compliance:
- no
- Dissociating properties:
- no
Reference
Study Results
Conductometer WTW LF 320 / SET Cell: TetraCon 325 |
Value |
Unit |
|
|
|
System Check (20 °C) |
|
|
KCl solution 0.01 mol/L, certified |
1380 – 1440 |
[µS/cm] |
KCl solution 0.01 mol/L, measurement |
1397 |
[µS/cm] |
Demineralized water |
0.4 |
[µS/cm] |
|
|
|
Sample measurement (20 °C) |
|
|
Sample, 10.0 g/L, dilution factor: 5 |
0.9 |
[µS/cm] |
Sample, 10.0 g/L |
1.8 |
[µS/cm] |
No conductivity could be measured which was ascribable on dissociation parts of the test item. Even at a concentration of 10 g/L, the measured conductivity is similar to the conductivity of water. Due to this facts, the test item does not dissociate in water.
Description of key information
No dissociation (OECD 112, conductometric method)
Key value for chemical safety assessment
Additional information
No conductivity could be measured. Even at a nominal concentration of 10 g/L, the measured conductivity is similar to the conductivity of water.
Additionally there are no relevant functional groups present in the molecules of the substance.
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