Registration Dossier
Registration Dossier
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EC number: 203-742-5 | CAS number: 110-16-7
Dissociation constant
Administrative data
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study without detailed documentation, Read across to maleic anhydride
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 002
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: OECD105
- Deviations:
- yes
- Remarks:
- see below (details on methods)
- GLP compliance:
- yes
Test material
- Reference substance name:
- Maleic anhydride
- EC Number:
- 203-571-6
- EC Name:
- Maleic anhydride
- Cas Number:
- 108-31-6
- Molecular formula:
- C4H2O3
- IUPAC Name:
- furan-2,5-dione
- Test material form:
- gas under pressure: refrigerated liquefied gas
- Details on test material:
- Hydrolysis to maleic acid occurs in aqueous conditions, so test substance was likely a mixture of maleic anhydride, maleic acid and its salts. Maleic acid was the analyte measured.
Constituent 1
Results and discussion
- Dissociating properties:
- yes
Dissociation constantopen allclose all
- No.:
- #1
- Temp.:
- 25 °C
- Remarks on result:
- other: K=1.14 x 10^-2 (pH = 1.94)
- No.:
- #2
- Temp.:
- 25 °C
- Remarks on result:
- other: 5.95 x 10^-7 (pH = 6.22)
Any other information on results incl. tables
K = 1.14 x 10-2(pH = 1.94) and 5.95 x 10-7(pH = 6.22) at 25 ºC
Applicant's summary and conclusion
- Conclusions:
- K = 1.14 x 10-2(pH = 1.94)
K = 5.95 x 10-7(pH = 6.22) at 25 ºC
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