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EC number: 800-838-4 | CAS number: 1384855-91-7
- 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
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:
- From 11 June, 2012 to 14 Sep, 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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))
- Version / remarks:
- (2008)
- Deviations:
- no
- 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))
- Version / remarks:
- (2001)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC estimation method
- Media:
- soil/sewage sludge
- Radiolabelling:
- no
- Details on study design: HPLC method:
- CALCULATION OF PKA
The following pKa values in the pH range of 1 - 14 were calculated using the Perrin calculation method (pKalc 5.0, module in Pallas 3.0, CompuDrug International San Francisco, USA): pKa acidic: none; pKa basic: none.
HPLC METHOD CONDITIONS
Based on the pKa calculations, the mobile phase was not buffered.
Instrument: Alliance Separation Module 2695 (Waters, USA)
Detector: Dual λ Absorbance Detector 2487 (Waters)
Column: Hypersil-BDS-CN, 150 mm x 4.6 mm i.d., dp= 5 µm (Thermo Fisher Scientific, USA)
Column temperature: 35°C ± 1°C
Mobile phase: 55/45 (v/v) methanol/water
Flow: 1 mL/min
Injection volume: 10 µL
UV detection: 210 nm
REFERENCE SUBSTANCES
Log Koc values based on soil adsorption data (OECD 121):
-Acetanilide, > 99.9%, CAS 103-84-4, log Koc 1.26
-Atrazine, 97.5%, CAS 1912-24-9, log Koc 1.81
-Monuron, 99.9%, CAS 150-68-5, log Koc 1.99
-2,5-Dichloroaniline, 99.8%, CAS 95-82-9, log Koc 2.55
-Benzoic acid phenylester, 99.9%, CAS 93-99-2, log Koc 2.87
-Fenthion, 96.2%, CAS 55-38-9, log Koc 3.31
-Phenanthrene, 98.1%, CAS 85-01-8, log Koc 4.09
-4,4’-DDT, 98.2%, CAS 50-29-3, log Koc 5.63
PREPARATION OF SOLUTIONS
Stock solutions of the reference substances at concentrations of approximately 1 g/L in methanol were used. The stock solutions were diluted to obtain an end solution of 55/45 (v/v) methanol/water.
A 1104 mg/L stock solution of the test substance was prepared in methanol. The stock solution was diluted to obtain a final concentration of 607.2 mg/L. End solution: 55/45 (v/v) methanol/water. All solutions containing the test substance were protected from light
A 5.61 g/L stock solution of the unretained compound formamide (99.8%) in methanol was used. The stock solution was diluted to obtain an end solution of 55/45 (v/v) methanol/water.
PERFORMANCE OF THE STUDY
The reference substance and test substance solutions were injected in duplicate. Blank solution (55/45 (v/v) methanol/water) was analysed by single injection. The capacity factor (k') of each compound was calculated from its retention time. The log k’ values of the references substances were plotted against the known log Koc values. A linear regression program was used to calculate the calibration curve (least squares method). The log Koc value for the test substance was calculated by substituting its mean log k’ in the calibration curve: log k’ = 0.284 x log Koc– 1.10 (r=0.974, n=16). The value of log Koc obtained from duplicate measurements was within ± 0.25 log units. - Key result
- Type:
- log Koc
- Value:
- 5.63 dimensionless
- Remarks on result:
- other: Peak area: 10%. Koc = 4.3E5
- Key result
- Type:
- log Koc
- Value:
- ca. 2.5 dimensionless
- Remarks on result:
- other: Peak area: 17.4%. Koc= 3.1E2.
- Key result
- Type:
- log Koc
- Value:
- ca. 3.33 dimensionless
- Remarks on result:
- other: Peak area: 26.1%. Koc= 2.1E3.
- Details on results (HPLC method):
- In the HPLC chromatogram of the test solution, two major peaks and several smaller peaks were observed. Measurements and results are summarized in the table below.
Remark: The major components have been assigned based on relative peak area and might not correspond with the major components mentioned in Confidential details on test material.
Chromatogram and calibration curve: see attachment. - Conclusions:
- Under the study conditions: (a) At neutral pH, the log Koc values for the two major peaks were 2.50 and 3.33 (Koc: 3.1E+2 and 2.1E+3), respectively (b) At neutral pH, the log Koc values for the 25 minor peaks (<10%) ranged from < 1.26 to > 5.63 (Koc ranges from < 18 to > 4.3E+5).
- Executive summary:
A study was conducted to determine the adsorption/desorption coefficient of the test substance, DPHA, according to OECD Guideline 121 and EU Method C.9, using the HPLC method at neutral pH, in compliance with GLP. According to the guidelines, the determination of the Koc for test substances that are ionized for at least 10% within pH 5.5 to 7.5 should be performed with both the ionized and non-ionized form. Therefore, the pKa values of the test substance were calculated using the Perrin calculation method. Based on the calculations, the HPLC analysis was performed at neutral pH. Solutions of reference substances with known log Koc values based on soil adsorption data and the test substance were analysed. The capacity factor (k') of each compound was calculated from its retention time. The log k’ values of the references substances were plotted against the known log Koc values. A linear regression program was used to calculate the calibration curve. Linear regression analysis was performed using the least squares method. The coefficient of correlation (r) was calculated. The log Koc value for the test substance was calculated by substituting its mean log k’ in the calibration curve. The value of log Koc obtained from duplicate measurements was within ± 0.25 log units. No pKa values were calculated in the logarithm range of 1 – 14 for acidic and basic groups in the molecular structure of both main components of the test substance using the Perrin calculation method. In the chromatogram of the test solution, several test substance peaks were observed. Under the study conditions: (a) At neutral pH, the log Koc values for the two major peaks were 2.50 and 3.33 (Koc: 3.1E+2 and 2.1E+3), respectively (b) At neutral pH, the log Koc values for the 25 minor peaks (<10%) ranged from < 1.26 to > 5.63 (Koc ranges from < 18 to > 4.3E+5) (Lammers, 2012).
Reference
Table: Measurements and results for the Koc determination of the test substance:
Substance |
tr,1 |
tr,2 |
mean tr |
log Koc |
Koc |
Area |
|
|
|
|
|
|
|
Formamide (t0) |
1.965 |
1.965 |
1.965 |
|
|
|
|
|
|
|
|
|
|
Acetanilide |
2.245 |
2.245 |
|
1.26 |
|
|
Atrazine |
2.452 |
2.454 |
|
1.81 |
|
|
Monuron |
2.521 |
2.520 |
|
1.99 |
|
|
2,5-Dichloroaniline |
2.846 |
2.843 |
|
2.55 |
|
|
Benzoic acid phenylester |
3.104 |
3.104 |
|
2.87 |
|
|
Fenthion |
4.092 |
4.089 |
|
3.31 |
|
|
Phenanthrene |
4.094 |
4.094 |
|
4.09 |
|
|
4,4’-DDT |
7.038 |
7.035 |
|
5.63 |
|
|
|
|
|
|
|
|
|
Peak 1 |
0.784 |
0.782 |
0.783 |
< 1.26 |
<1.8E1 |
0.3 |
Peak 2 |
0.997 |
0.994 |
0.996 |
< 1.26 |
<1.8E1 |
0.1 |
Peak 3 |
1.255 |
1.255 |
1.255 |
< 1.26 |
<1.8E1 |
0.1 |
Peak 4 |
1.717 |
1.718 |
1.718 |
< 1.26 |
<1.8E1 |
1.4 |
Peak 5 |
1.972 |
1.973 |
1.973 |
< 1.26 |
<1.8E1 |
2.2 |
Peak 6 |
2.223 |
2.222 |
2.223 |
< 1.26 |
<1.8E1 |
1.6 |
Peak 7 |
2.428 |
2.424 |
2.426 |
1.65 |
4.5E1 |
6.7 |
Peak 8 |
2.625 |
2.623 |
2.624 |
2.20 |
1.6E2 |
2.2 |
Peak 9 (major component 1) |
2.768 |
2.766 |
2.767 |
2.50 |
3.1E2 |
17.4 |
Peak 10 |
2.905 |
2.902 |
2.904 |
2.74 |
5.4E2 |
6.6 |
Peak 11 (major component 2) |
3.349 |
3.347 |
3.348 |
3.33 |
2.1E3 |
26.1 |
Peak 12 |
3.566 |
3.564 |
3.565 |
3.55 |
3.6E3 |
7.4 |
Peak 13 |
3.841 |
3.839 |
3.840 |
3.79 |
6.2E3 |
2.0 |
Peak 14 |
4.001 |
3.998 |
4.000 |
3.92 |
8.3E3 |
2.6 |
Peak 15 |
4.284 |
4.279 |
4.282 |
4.12 |
1.3E4 |
1.6 |
Peak 16 |
4.526 |
4.523 |
4.525 |
4.27 |
1.9E4 |
0.5 |
Peak 17 |
4.726 |
4.722 |
4.724 |
4.38 |
2.4E4 |
0.6 |
Peak 18 |
5.074 |
5.072 |
5.073 |
4.57 |
3.7E4 |
5.1 |
Peak 19 |
5.509 |
5.506 |
5.508 |
4.77 |
5.8E4 |
2.6 |
Peak 20 |
5.959 |
5.956 |
5.958 |
4.95 |
8.9E4 |
1.2 |
Peak 21 |
6.396 |
6.393 |
6.395 |
5.11 |
1.3E5 |
0.8 |
Peak 22 |
6.897 |
6.894 |
6.896 |
5.27 |
1.9E5 |
4.0 |
Peak 23 |
7.576 |
7.574 |
7.575 |
> 5.63 |
> 4.3E5 |
2.2 |
Peak 24 |
8.385 |
8.383 |
8.384 |
> 5.63 |
> 4.3E5 |
1.8 |
Peak 25 |
9.254 |
9.250 |
9.252 |
> 5.63 |
> 4.3E5 |
1.4 |
Peak 26 |
12.218 |
12.217 |
12.218 |
> 5.63 |
> 4.3E5 |
1.0 |
Peak 27 |
13.611 |
13.600 |
13.606 |
> 5.63 |
> 4.3E5 |
0.5 |
Description of key information
Based on the study results: (a) At neutral pH, the log Koc values for the two major peaks were 2.50 and 3.33 (Koc: 3.1E+2 and 2.1E+3), respectively (b) At neutral pH, the log Koc values for the 25 minor peaks (<10%) ranged from < 1.26 to > 5.63 (Koc ranges from < 18 to > 4.3E+5).
Key value for chemical safety assessment
- Koc at 20 °C:
- 430 000
Additional information
A study was conducted to determine the adsorption/desorption coefficient of the test substance, DPHA, according to OECD Guideline 121 and EU Method C.9, using the HPLC method at neutral pH, in compliance with GLP. According to the guidelines, the determination of the Koc for test substances that are ionized for at least 10% within pH 5.5 to 7.5 should be performed with both the ionized and non-ionized form. Therefore, the pKa values of the test substance were calculated using the Perrin calculation method. Based on the calculations, the HPLC analysis was performed at neutral pH. Solutions of reference substances with known log Koc values based on soil adsorption data and the test substance were analysed. The capacity factor (k') of each compound was calculated from its retention time. The log k’ values of the references substances were plotted against the known log Koc values. A linear regression program was used to calculate the calibration curve. Linear regression analysis was performed using the least squares method. The coefficient of correlation (r) was calculated. The log Koc value for the test substance was calculated by substituting its mean log k’ in the calibration curve. The value of log Koc obtained from duplicate measurements was within ± 0.25 log units. No pKa values were calculated in the logarithm range of 1 – 14 for acidic and basic groups in the molecular structure of both main components of the test substance using the Perrin calculation method. In the chromatogram of the test solution, several test substance peaks were observed. Under the study conditions: (a) At neutral pH, the log Koc values for the two major peaks were 2.50 and 3.33 (Koc: 3.1E+2 and 2.1E+3), respectively (b) At neutral pH, the log Koc values for the 25 minor peaks (<10%) ranged from < 1.26 to > 5.63 (Koc ranges from < 18 to > 4.3E+5) (Lammers, 2012).
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