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Registration Dossier
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EC number: 300-338-1 | CAS number: 93925-36-1
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption: screening
- Remarks:
- adsorption
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable calculation method
Data source
Reference
- Reference Type:
- publication
- Title:
- Predicting the sorption of fatty alcohols and alcohol ethoxylates to effluent and receiving water solids.
- Author:
- van Compernolle R1, McAvoy DC, Sherren A, Wind T, Cano ML, Belanger SE, Dorn PB, Kerr KM
- Year:
- 2 006
- Bibliographic source:
- Ecotoxicology and Environmental Safety 65: 61-74
Materials and methods
- Principles of method if other than guideline:
- Mixture of spiked activated sludge sediment and river water was stirred and the subsequent adsorption of radioactive substance to the suspended matter counted by LSC.
- GLP compliance:
- no
- Type of method:
- other: Radiolabelled C14 count via LSC
- Media:
- soil/sewage sludge
Test material
- Reference substance name:
- Dodecanol
- IUPAC Name:
- Dodecanol
- Details on test material:
- - Name of test material (as cited in study report): C14-Dodecanol, 295 mCi/g
- Substance type: Alcohol
- Physical state: liquid
- Analytical purity: GC of unlabeled alcohol C12 to LSC concentration in spiked alcohol resulted in a ratio of 0.95
- Lot/batch No.: 030626
- Expiration date of the lot/batch:
- Radiochemical purity (if radiolabelling): >99 %
- Specific activity (if radiolabelling): 250 µCi per alcohol
Constituent 1
- Radiolabelling:
- yes
Study design
- Test temperature:
- Not specified
Batch equilibrium or other method
- Analytical monitoring:
- not required
- Computational methods:
- Mathematical fitting of sorption data:
log K = xC + b (where K is the sorption coefficient in L/kg, C is the carbon number of the alkyl side chain; x and b are fitted by the regression routine that minimises the least-squares residual (R2).
Results and discussion
Adsorption coefficientopen allclose all
- Type:
- log Koc
- Value:
- 4.25
- Remarks on result:
- other: dodecanol, derived from kd value using foc=0.167
- Type:
- log Koc
- Value:
- 4.71
- Remarks on result:
- other: tetradecanol, derived from kd value using foc=0.167
- Type:
- Kd
- Value:
- 3 000
- Remarks on result:
- other: dodecanol, measured ±78 after 72 h
- Type:
- Kd
- Value:
- 6 400
- Remarks on result:
- other: tridecanol (estimated)
- Type:
- Kd
- Value:
- 8 490
- Remarks on result:
- other: tetradecanol, measured ±916 after 72 h
- Type:
- Kd
- Value:
- 30 000
- Remarks on result:
- other: pentadecanol (estimated)
Any other information on results incl. tables
The results demonstrate that sorption can be effectively modeled using a log Kd vs. Cx and EOy predictive equation having the form log Kd = 0.331C - 0.00897EO - 1.126 (R2 = 0.64).
Applicant's summary and conclusion
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