Registration Dossier
Registration Dossier
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EC number: 266-358-7 | CAS number: 66423-13-0
Distribution modelling
Administrative data
- Endpoint:
- distribution modelling
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 03/2012
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: generally accepted calculation method
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
- Model:
- calculation according to Mackay, Level I
- Calculation programme:
- Fugacity-Based Environmental Equilibrium Partitioning Model; Environmetal Modelling Centre; Trent University Peterborough, Ontario, Canada. Version 2.11 (1999).
- Release year:
- 1 999
- Media:
- other: air-biota-sediment(s)-soil-water-aerosol
Test material
- Reference substance name:
- 19484-77-8
- IUPAC Name:
- 19484-77-8
- Reference substance name:
- (R)-2-(4-chloro-2-methylphenoxy)propionic acid
- EC Number:
- 240-539-0
- EC Name:
- (R)-2-(4-chloro-2-methylphenoxy)propionic acid
- Cas Number:
- 16484-77-8
- Molecular formula:
- C10H11ClO3
- IUPAC Name:
- (2R)-2-(4-chloro-2-methylphenoxy)propanoic acid
- Reference substance name:
- Mecoprop-P acid
- IUPAC Name:
- Mecoprop-P acid
- Reference substance name:
- MCPP-P acid
- IUPAC Name:
- MCPP-P acid
- Details on test material:
- results relate to pure substance
Constituent 1
Constituent 2
Constituent 3
Constituent 4
Results and discussion
Percent distribution in media
- Air (%):
- 0.002
- Water (%):
- 99.98
- Soil (%):
- 0.008
- Sediment (%):
- 0.008
- Susp. sediment (%):
- 0
- Biota (%):
- 0
- Aerosol (%):
- 0
Any other information on results incl. tables
In the model Mecoprop-P acid (MCPP-P acid) is treated as a type 1 chemical, i.e. the chemical partitions into all environmental media. Estimation is carried at an environmental temperature of 25 °C.
Applicant's summary and conclusion
- Conclusions:
- Released to the environment the main compartment for Mecoprop-P acid (MCPP-P acid), the hydrolysis product of Mecoprop-P n-octyl ester, is water with 99.98 %.
- Executive summary:
Mecoprop-P n-octyl ester hydrolyses rapidly in natural water. Therefore, the hydrolysis product Mecoprop-P acid (MCPP-P acid) was used for further risk assessment of Mecoprop-P n-octyl ester in the environment (distribution modelling).
The distribution of Mecoprop-P acid (MCPP-P acid) in a "unit world" was calculated according to the Mackay fugacity model level I based on the physico-chemical properties. The main target compartment for Mecoprop-P acid (MCPP-P acid) is water with 99.98 %, followed by soil and sediment with 0.008 % and air with 0.002 %, respectively.
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