Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 212-783-8 | CAS number: 868-85-9
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Accepted calculation method
Data source
Referenceopen allclose all
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 003
- Reference Type:
- secondary source
- Title:
- Dimethyl phosphonate - CAS No: 868-85-9 - SIDS Initial Assessment Report.
- Author:
- OECD
- Year:
- 2 004
- Bibliographic source:
- UNEP Publications
Materials and methods
- Model:
- calculation according to Mackay, Level I
- Calculation programme:
- - Multimedia Environmental Models, The Fugacity Approach, Lewis Publishers, Inc. Chelsea, Michigan, 1991
- Level I, v 2.11 model
- "unit world" modelling - Media:
- air - biota - sediment(s) - soil - water
Test material
- Reference substance name:
- Dimethyl phosphonate
- EC Number:
- 212-783-8
- EC Name:
- Dimethyl phosphonate
- Cas Number:
- 868-85-9
- Molecular formula:
- C2H7O3P
- IUPAC Name:
- dimethyl phosphonate
Constituent 1
Study design
- Test substance input data:
- - Molar mass: 110.05 g/mol
- Data temperature: 20°C
- Water solubility: 1.0 x 10E5 g/m³ = 100 g/l
- Vapour pressure: 135 Pa
- log Pow: -1.20
- Melting point: -60°C
Results and discussion
Any other information on results incl. tables
Calculated distribution between environmental compartments:
Compartment |
Calculated distribution |
Air |
5.0 % |
Water |
95.0 % |
Soil |
<0.01 % |
Sediment |
<0.01 % |
Susp. Sediment |
<0.01 % |
Aerosol |
<0.01 % |
Aquatic Biota (Fish) |
<0.01 % |
Calculated distributions of substances in air-water or in a "unit world" are only applicable as long as the test substance is stable enough to reach equilibrium. The reported calculations of these distributions do not consider the hydrolysis of dimethyl phosphonate. According to the Mackay Fugacity Model Level I, the main target compartment for dimethyl phosphonate in a "unit world" is water with 95%. The remaining 5% of dimethyl phosphonate will be released into the air.
Since the water solubility of the degradation product monomethyl phosphonate is about one order of magnitude higher and the vapour pressure one order of magnitude lower, it can be assumed that the exclusive target compartment according to the Mackay Fugacity Model Level I is water.
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.
