Registration Dossier
Registration Dossier
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EC number: 201-204-4 | CAS number: 79-41-4
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Principles of method if other than guideline:
- The solubility of the ester was determined by saturating a volume of deionised water, with an excess of ester until two distinct layers formed. The mixtures was placed on a rotary mixer for 20 minutes and then allowed to equilibrate for a further four hours at 20ºC. An aliquot of the lower
layer (aqueous phase) was carefully removed using a Pasteur pipette, thus avoiding contamination from the upper layer. This aqueous phase was quantitatively analysed by RP-HPLC. The solubility of the ester in water is expressed as g kg-1. - GLP compliance:
- not specified
- Type of method:
- flask method
- Specific details on test material used for the study:
- Methyacrylic acid (CAS: 79-41-4)
Purity: > 99 %
Batch No.: 98/42
Supplier: Ineos Acrylics - Key result
- Water solubility:
- 98 g/L
- Temp.:
- 20 °C
- pH:
- >= 1.2 - <= 2
- Details on results:
- pH concentration: 98 g/l at 20 °C (pH: 1.2 - 2.0)
- Conclusions:
- Interpretation of results (migrated information): very soluble (> 10000 mg/L)
Using a scientifically valid method a water solubility of 98 g/L at 20°C was reported. - Executive summary:
The water solubility of methacrylic acid was tested by the flask method and analysed by HPLC. The water solubility was reported with 98 g/L at 20°C.
Reference
Description of key information
The water solubility of methacrylic acid was tested by the flask method and analysed by HPLC. The water solubility was reported with 98 g/L at 20°C (Jones 2002).
Key value for chemical safety assessment
- Water solubility:
- 98 g/L
- at the temperature of:
- 20 °C
Additional information
According a technical data collection reported in Ullmann Ezyclopedia of Industrial Chemial (Bauer, 1990) methacrylic acid is misciblle in water.
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