Registration Dossier
Registration Dossier
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EC number: 436-000-6 | CAS number: 159010-67-0
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- other: estimation
- Adequacy of study:
- weight of evidence
- Study period:
- 2001
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
Data source
Reference
- Reference Type:
- other: expert statement
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
- Principles of method if other than guideline:
- Estimation
- GLP compliance:
- no
- Type of method:
- other: estimation
- Media:
- soil
Test material
- Reference substance name:
- Blue REg 6080
- IUPAC Name:
- Blue REg 6080
Constituent 1
Study design
Batch equilibrium or other method
- Computational methods:
- The estimation was performed based on a water solubility of below 0.06 mg/I using regression equations (Lyman, Reehl, Rosenblatt: Handbook of Chemical Property Estimation Methods, 1990) and relating the Koc with the water solubility.
Furthermore, the molecular weight of test item, 626.5 g/mol was used.
Regression I: log Koc = -0.55 log S + 3.64 (S in mg/I)
Regression II: log Koc = -0.54 log S + 0.44 (S in mole fraction)
Regression Ill: log Koc = -0.557 log S + 4.277 (S in μmoles/I)
Additionally, an estimation was performed based on the octanol/water partition coefficient of log Pow= 3.3 using a regression equation (source as above)
relating the Koc with Pow.
Regression IV: log Koc = 0.544 · log Pow + 1.377
Results and discussion
Adsorption coefficientopen allclose all
- Type:
- Koc
- Value:
- 1 487 dimensionless
- Remarks on result:
- other: calculation based on log Pow of 3.3
- Type:
- Koc
- Value:
- > 20 512 dimensionless
- Remarks on result:
- other: calculation based on water solubility < 0.06 mg/l
Applicant's summary and conclusion
- Conclusions:
- Based on a log Pow of 3.3, Koc is1487 indicating that test item is little mobile in soils.
Based on a water solubility of less than 0.06 mg/l, Koc is 20512 or higher, thus test item is classified as immobile in soils.
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