Registration Dossier
Registration Dossier
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EC number: 236-419-2 | CAS number: 13360-78-6
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 112 (Dissociation Constants in Water)
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- - Name of test material (as cited in study report): Aerophine 3418A Promoter, stripped
- IUPAC nomenclature - Sodium diisobutyldithiophosphinate
- Lot WEA102051
- Appearance - White powder with lumps
- CAS No. 13360-78-6
- Molecular Formula - C8H18PS2.Na
- Molecular Weight - 232 g/mole
- Purity > 99% - Dissociating properties:
- yes
- No.:
- #1
- pKa:
- 7.1
- Temp.:
- 20 °C
- No.:
- #2
- pKa:
- 8
- Temp.:
- 20 °C
- Conclusions:
- The test substance has two pKa’s (dissociation constants); 7.1 and 8.0.
- Executive summary:
The test substance has two pKa’s (dissociation constants); 7.1 and 8.0. The pKawas determined using an automated titration method.
Reference
Run No. |
endpoint 1 |
pKa1 |
endpoint 1 |
pKa2 |
sample weight (g) |
1 |
7.374 |
7.129 |
9.000 |
8.109 |
9.366 |
2 |
7.247 |
6.996 |
8.892 |
8.007 |
6.070 |
3 |
7.172 |
7.042 |
9.038 |
7.990 |
13.281 |
Avg. and S.D.à |
7.264±0.102 |
7.056± 0.068 |
8.977± 0.076 |
8.035± 0.064 |
|
Description of key information
The test substance has two pKa’s (dissociation constants); 7.1 and 8.0.
Key value for chemical safety assessment
- pKa at 20°C:
- 7.1
Additional information
Determined using an automated titration method.
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