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EC number: 406-176-9 | CAS number: 79072-96-1 NC-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_environmental-fate-and-pathways.png)
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Experimental starting date: 04 March 2020; Experimental completion date: 13 March 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC estimation method
- Test temperature:
- 30°C
- Details on study design: HPLC method:
- Test System:
The test system utilized a high performance liquid chromatograph. A commercially available cyanopropyl reverse phase HPLC column containing lipophilic and polar moieties was used.
Performance of the Test:
Preparation of dead time solution: The dead time was determined by measuring the retention time of a solution of formamide (purity 99.6%) at 708 mg/L in methanol:water (55:45 v/v).
Preparation of reference standard solutions:
Solutions of reference standards (see below) were prepared in methanol.
Standard Purity (%) Concentration (mg/L)
Acetanilide 99+ 108
Phenol 99 106
Atrazine 99 107
Isoproturon >98.0 109
Triadimenol 97.8 102
Linuron 99.7 106
Naphthalene 99 113
Endosulfan-diol 99.9 109
Fenthion 98.6 109
Endosulfan 99.8 116
Diclofop-methyl 99.8 146
Phenanthrene ≥99.5 100
DDT 98.7 123
Preparation of sample solution:
Test item (0.0997g) was diluted to 100 mL with dimethyl sulfoxide and diluted by a factor of 2 with methanol to give a concentration of 499 mg/L.
Determination of retention time:
The sample, dead time and reference standard solutions were injected in duplicate using the following HPLC parameters:
HPLC System: Agilent Technologies 1100, incorporating workstation and autosampler
Detector type: variable wavelength (VW)
Column: XSelect HSS Cyano 5µ (150 x 4.6 mm id)
Column temperature: 30 °C
Mobile phase: methanol:water (55:45 v/v)
pH of mobile phase: 7.2
Flow-rate: 1.0 mL/min
Injection volume: 10 µL
VW detector wavelength: 210 nm
Evaluation of Data:
Capacity factor:
The capacity factor for each reference standard was calculated using the following equation:
k' = tr - t0 / t0
where:
k' = capacity factor
tr = retention time (min)
t0 = dead time (min)
Construction of the calibration curve:
A correlation of log10 k' versus log10 Koc of the reference standards was plotted using linear regression. The capacity factors (k') for the reference standards were calculated using the previous equation. Log10 Koc values are those quoted in Method 121 of the OECD Guidelines for Testing of Chemicals, 22 January 2001.
Adsorption coefficient:
The adsorption coefficient was then calculated using the following equation with reference to the calibration curve.
lgo10Koc = log10 k' - A / B
where:
Koc = adsorption coefficient
k' = capacity factor
A = intercept of the calibration curve
B = slope of the calibration curve - Type:
- Koc
- Value:
- 1 890 dimensionless
- pH:
- 7.2
- Temp.:
- 30 °C
- Type:
- log Koc
- Value:
- 3.28 dimensionless
- pH:
- 7.2
- Temp.:
- 30 °C
- Validity criteria fulfilled:
- yes
- Conclusions:
- The adsorption coefficient of the test item has been determined to be 1890, log10 Koc 3.28.
- Executive summary:
The adsorption coefficient of EDBS has been determined to be 1.89 x 103, log10Koc 3.28, using the HPLC screening method, designed to be compatible with Method C.19 Adsorption Coefficient of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 121 of the OECD Guidelines for Testing of Chemicals, 22 January 2001.
Reference
Calibration:
The retention times of the dead time and the retention times, capacity factors and log10Kocvalues for the reference standards are shown in the following table:
Standard |
Retention Time (min) |
Mean Retention Time (min) |
Capacity Factor (k') |
Log10k' |
Log10Koc |
|
Injection 1 |
Injection 2 |
|||||
Formamide (dead time) |
1.969 |
1.969 |
1.969 |
- |
- |
-- |
Acetanilide |
2.695 |
2.695 |
2.695 |
0.369 |
-0.433 |
1.25 |
Phenol |
2.574 |
2.576 |
2.575 |
0.308 |
-0.511 |
1.32 |
Atrazine |
3.712 |
3.714 |
3.713 |
0.886 |
-5.26 x 10-2 |
1.81 |
Isoproturon |
3.960 |
3.957 |
3.959 |
1.011 |
4.66 x 10-3 |
1.86 |
Triadimenol |
5.314 |
5.318 |
5.316 |
1.700 |
0.231 |
2.40 |
Linuron |
5.444 |
5.449 |
5.446 |
1.766 |
0.247 |
2.59 |
Naphthalene |
4.720 |
4.725 |
4.722 |
1.399 |
0.146 |
2.75 |
Endosulfan-diol |
6.744 |
6.752 |
6.748 |
2.428 |
0.385 |
3.02 |
Fenthion |
8.035 |
8.049 |
8.042 |
3.085 |
0.489 |
3.31 |
a-Endosulfan |
11.406 |
11.411 |
11.408 |
4.795 |
0.681 |
4.09 |
Diclofop-methyl |
12.336 |
12.359 |
12.348 |
5.272 |
0.722 |
4.20 |
Phenanthrene |
8.809 |
8.819 |
8.814 |
3.477 |
0.541 |
4.09 |
DDT |
24.152 |
24.267 |
24.210 |
11.297 |
1.05 |
5.63 |
Adsorption Coefficient
The retention time, capacity factor and log10Kocvalues determined for the sample are shown in the following table:
Table 3
Injection |
Retention Time (min) |
Capacity Factor (k') |
Log10k' |
Log10Koc |
1 |
6.685 |
2.40 |
0.379 |
3.28 |
2 |
6.689 |
2.40 |
0.380 |
3.28 |
Mean log10Koc: 3.28
Adsorption coefficient: 1.89
x 103
Description of key information
The adsorption coefficient of EDBS has been determined to be 1.89 x 103, log10Koc 3.28, using the HPLC screening method.
Key value for chemical safety assessment
- Koc at 20 °C:
- 1 890
Additional information
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.
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