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EC number: 218-747-8 | CAS number: 2224-33-1
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours)
- Justification for type of information:
- JUSTIFICATION FOR DATA WAIVING
In accordance with Column 2 of REACH Annex VII, the study does not need to be conducted if the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours). The test item undergoes rapid hydrolysis (half-life < 1h) in aqueous to 2-butanone oxime and the corresponding methylsilanetriol. Moreover, silanetriols undergo continuous condensation reactions to produce higher molecular weight siloxanes which are considered biologically unavailable. - Endpoint:
- water solubility
- Type of information:
- other: Handbook peer reviewed.
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- No data provided on the method.
- GLP compliance:
- not specified
- Type of method:
- other: no data
- Key result
- Water solubility:
- 100 000 mg/L
- Remarks on result:
- other: (temperature and pH is not provided)
- Conclusions:
- The solubility of butanone oxime is 100000 mg/L.
- Executive summary:
The solubility of butanone oxime is 100000 mg/L.
- Endpoint:
- water solubility
- Type of information:
- (Q)SAR
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Remarks:
- Internationally accepted method, EPI Suite, EPA (USA)
- Justification for type of information:
- See attached the QMRF and QPRF for the QSAR model.
- Principles of method if other than guideline:
- Calculation by EPI Suite, EPA (USA) v4.1 / WSKOW v1.42
- Type of method:
- other: EPI Suite calculation
- Key result
- Water solubility:
- 36 630 mg/L
- Temp.:
- 25 °C
- Remarks on result:
- other: (pH value is not given in EPI Suite calculation)
- Conclusions:
- The water solubility of 2-butanone, oxime was 36630 mg/L at 25 ºC (EPI Suite, WSKOW v1.42).
- Executive summary:
The water solubility of 2-butanone, oxime was 36630 mg/L at 25 ºC (EPI Suite, WSKOW v1.42).
- Endpoint:
- water solubility
- Type of information:
- (Q)SAR
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Remarks:
- Internationally accepted method, EPI Suite, EPA (USA)
- Justification for type of information:
- See attached the QMRF and QPRF for the QSAR model.
- Principles of method if other than guideline:
- Calculation by EPI Suite, EPA (USA) v4.1 / WSKOW v1.42
- Type of method:
- other: EPI Suite calculation
- Key result
- Water solubility:
- 1 000 000 mg/L
- Temp.:
- 25 °C
- Remarks on result:
- other: (pH value is not given in EPI Suite calculation)
- Conclusions:
- The water solubility of vinylsilanetriol was 1000000 mg/L at 25 ºC (EPI Suite, WSKOW v1.42).
- Executive summary:
The water solubility of vinylsilanetriol was 1000000 mg/L at 25 ºC (EPI Suite, WSKOW v1.42).
Referenceopen allclose all
Description of key information
In accordance with Column 2 of REACH Annex VII, the study does not need to be conducted if the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours). The estimated water solubility of the degradation products were 36630 mg/L for 2-butanone oxime and 1000000 mg/L for vinylsilanetriol (EPI-Suite, WSKOW v1.42).
Key value for chemical safety assessment
- Water solubility:
- 36 630 mg/L
Additional information
In accordance with Column 2 of REACH Annex VII, the study does not need to be conducted if the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours). The substance undergoes rapid hydrolysis (half-life < 1h) in aqueous to 2-butanone oxime and vinylsilanetriol. Morevoer, the corresponding silanols undergo continuous condensation reactions to produce higher molecular weight siloxanes which are considered biologically unavailable.
The estimated water solubility for the degradation products, 2 -butanone oxime and vinylsilanetriol were 36630 mg/L and 1000000 mg/L (EPI-Suite, WSKOW v1.42). Moreover, according to Verschueren et al (2009) the water solubility of 2 -butanone oxime was reported to be 100000 mg/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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