Registration Dossier
Registration Dossier
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EC number: 204-634-0 | CAS number: 123-54-6
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Accepted calculation method.
Data source
Materials and methods
- Model:
- calculation according to Mackay, Level I
- Media:
- other: air-water-soil-sediment-biota
Test material
- Reference substance name:
- Pentane-2,4-dione
- EC Number:
- 204-634-0
- EC Name:
- Pentane-2,4-dione
- Cas Number:
- 123-54-6
- Molecular formula:
- C5H8O2
- IUPAC Name:
- pentane-2,4-dione
Constituent 1
Results and discussion
Percent distribution in media
- Air (%):
- 10.05
- Water (%):
- 89.77
- Soil (%):
- 0.17
Any other information on results incl. tables
Type : adsorption
Media : water - soil
The water solubility of acetylacetone has been determined to be 166 - 200
g/L at 20°C. In addition with a (measured) partition coefficient of 0.4, soil
adsorption constants were estimated to be in the range of 6 - 28 indicating
high mobility of acetylacetone in soil.
Type : volatility
Media : soil - air
Considering the vapour pressure of approx. 9 hPa, volatilization from dry
surfaces into the atmosphere cannot be excluded.
Type : volatility
Media : water - air
Based on a water solubility of 166 g/L and a vapour pressure of 9.2 hPa, a
Henry's law constant of 0.555 Paxm3/mol can be calculated for
acetylacetone, indicating a slow volatilization from aqueous media.
Applicant's summary and conclusion
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
