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EC number: 233-937-0 | CAS number: 10450-60-9
- 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:
- 06 April 2018 to 28 November 2018
- 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:
- 2016
- 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
- Qualifier:
- according to guideline
- Guideline:
- other: EC Technical Guidance Document on Risk Assessment Part III Chapter 4.3: Use of (Quantitative) Structure Activity Relationships ((Q)SARs) - Soil and Sediment Sorption.
- Version / remarks:
- 2003
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- HPLC estimation method
- Media:
- soil
- Radiolabelling:
- no
- Test temperature:
- 35 °C
- Details on study design: HPLC method:
- BUFFER SOLUTIONS
Acetate buffer pH 4, 0.01 M: Solution of 16.7 % 0.01 M sodium acetate in water and 83.3 % 0.01 M acetic acid in water. Buffer contained 0.0009 % (w/v) sodium azide.
PERFORMANCE OF THE STUDY
The principle of the test method is similar to that of the OECD guideline no. 117: "Partition coefficient (n-octanol/water), high performance liquid chromatography (HPLC) method". While passing through the column along with the mobile phase the test material interacts with the stationary phase. As a result of partitioning between mobile and stationary phases, the test material is retarded. The dual composition of a cyanopropyl stationary phase, having polar and non-polar sites allows for interaction of polar and non-polar groups of a molecule in a similar way as is the case for organic matter in soil or sewage sludge matrices. This enables the relationship between the retention time on the column and the Koc on organic matter to be established.
According to the guidelines, the determination of the Koc for test materials 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. The test material is a strong inorganic acid and therefore no calculations were performed. The HPLC method was performed at the lowest environmentally relevant pH from the hydrolysis study; pH 4.
Solutions of one reference substance based on soil adsorption data and the test material were analysed. Based on the retention times of the compounds the Koc and log Koc values of the test material were determined.
ANALYTICAL METHOD
Analytical Conditions:
Instrument: Acquity UPLC system (Waters, Milford, MA, USA).
Detector: Acquity UPLC TUV detector (Waters)
Column: Acquity UPLC HSS Cyano, 100 mm x 2.1 mm i.d., dp = 1.8 µm (Waters)
Column temperature: 35 °C ± 1 °C
Injection volume: 5 µL
Mobile phase: 55/45 (v/v) methanol/buffer pH 4
Flow: 0.4 mL/min
UV detection: 210 nm
PREPARATION OF SOLUTIONS
Reference Substance Solution:
- A stock solution of the reference substance at a concentration of approximately 1 g/L in methanol was used. The stock solution was diluted to obtain an end solution of 55/45 (v/v) methanol/buffer pH 4.
- The blank solution for the reference substance was 55/45 (v/v) methanol/buffer pH 4.
Reference Substance:
- Acetanilide (purity 99.8 %). logKoc value according to OECD 121 = 1.26
Test Solution:
- A 2 500 mg/L stock solution of the test material was prepared in buffer pH 4. The stock solution was 100 fold diluted with 55/45 (v/v) methanol/buffer pH 4. The final concentration of the test material solution was 25.0 mg/L.
- The test material blank solution was 55/45 (v/v) methanol/buffer pH 4.
Sample Injections
Reference substance and test material solutions were injected in duplicate. Blank solutions were analysed by single injection. - Sample No.:
- #1
- Type:
- log Koc
- Value:
- < 1.26 dimensionless
- pH:
- 7
- Temp.:
- 35 °C
- Matrix:
- HPLC method based on soil-adsorption reference data
- Sample No.:
- #1
- Type:
- Koc
- Value:
- 18 L/kg
- pH:
- 7
- Temp.:
- 35 °C
- Matrix:
- HPLC method based on soil-adsorption reference data
- Details on results (HPLC method):
- One peak from the test material was observed with a retention time of 0.571 minutes and one carry-over peak from the acetanilide standard. Under the same analytical conditions, the retention time of acetanilide (log Koc = 1.26) was 0.914 minutes. It was concluded that the log Koc of the test material was < 1.26 (Koc < 1.8 x 10^1).
- Validity criteria fulfilled:
- yes
- Conclusions:
- Under the conditions of the test the Koc of the test material was 1.8 x 10^1, log Koc < 1.26.
- Executive summary:
The soil adsorption coefficient of the test material was assessed according to EC Guideline C.19. and OECD Guideline 121 in accordance with the principles of GLP using an HPLC method.
One peak from the test material was observed with a retention time of 0.571 minutes and one carry-over peak from the acetanilide standard. Under the same analytical conditions, the retention time of acetanilide (log Koc = 1.26) was 0.914 minutes.
Under the conditions of the test the Koc of the test material was 1.8 x 10^1, log Koc < 1.26.
Reference
Koc of the Test Material
Substance |
Retention time (min) |
log Koc |
Koc |
||
tr,1 |
tr,2 |
mean |
|||
Acetanilide |
0.913 |
0.915 |
0.914 |
1.26 |
|
Test material |
0.570 |
0.571 |
0.571 |
< 1.26 |
1.8 x 10^1 |
Description of key information
Under the conditions of the test (at 35°C) the Koc of the test material was 1.8 x 10^1, log Koc < 1.26.
Key value for chemical safety assessment
- Koc at 20 °C:
- 18
Additional information
The soil adsorption coefficient of the test material was assessed according to EC Guideline C.19. and OECD Guideline 121 in accordance with the principles of GLP using an HPLC method. The study was assigned a reliability score of 1 in accordance with the principles for assessing data quality as outlined by Klimisch et al. (1997).
One peak from the test material was observed with a retention time of 0.571 minutes and one carry-over peak from the acetanilide standard. Under the same analytical conditions, the retention time of acetanilide (log Koc = 1.26) was 0.914 minutes.
Under the conditions of the test the Koc of the test material was 1.8 x 10^1, log Koc < 1.26.
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