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EC number: 246-929-7 | CAS number: 25383-99-7
- 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
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27 - 31 Jan 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- GLP compliance:
- no
- Type of method:
- OECD harmonised ring method
- Surface tension:
- >= 37.09 - <= 53.23 mN/m
- Temp.:
- 20 °C
- Remarks on result:
- other: surface tension range determined for water solutions between 10 and 1 mg/L, respectively
- Conclusions:
- A surface tension range in water of 37.09 mN/m (conc. 10 mg/L) to 53.23 mN/m (conc. 1 mg/L) was determined for the test item, which should be therefore regarded as surface active, according to EU Method A.5
Reference
Results
The determination of the critical micelle concentration (CMC) was conducted by measuring the surface tension of the test item at 20 ± 0.5 °C and at different concentrations (see table below). For the evaluation of the CMC, a graph ‘Test Concentration’ vs. ‘Surface Tension’ was created.
Concentration [mg/L] |
Surface Tension (1) [mN/m] |
Time (2) [h] |
Time (3) [min] |
Temp. (4) [°C] |
1.00 |
53.23 |
92.2 |
94 |
19.8 - 19.9 |
2.01 |
49.98 |
88.6 |
96 |
19.8 – 20.2 |
2.51 |
48.26 |
70.2 |
74 |
19.8 – 20.1 |
3.01 |
46.04 |
68.2 |
81 |
20.1 – 20.2 |
3.52 |
46.94 |
65.5 |
87 |
19.8 – 20.1 |
4.02 |
45.01 |
46.3 |
67 |
19.7 – 19.9 |
4.52 |
43.06 |
43.6 |
84 |
19.7 – 19.9 |
5.02 |
42.49 |
40.7 |
70 |
19.9 – 20.0 |
6.03 |
40.33 |
23.3 |
104 |
20.0 – 20.1 |
8.04 |
39.89 |
21.3 |
71 |
19.9 – 20.1 |
10.0 |
37.09 |
18.1 |
139 |
19.8 – 20.1 |
(1) The density of each test solution was in the range of 0.998 to 1.011 g/mL
(2) Time from preparation of the test solution (stored in an air-conditioned room at 20 °C) until start of the measurement
(3) Time from start of the measurement till end of the surface tension measurement
(4) Temperature of the test solution during the determination of the respective surface tension
Calculations
Equation R-squared of the “fall phase”: y1 = -2.6218x + 55.27; R² = 0.9617
Equation R-squared of the “plateau phase”: y2 = -0.81x + 45.58; R² = 0.85
The critical micelle concentration is calculated from the point of intersection of the two lines y1
and y2:
-2.6218x + 55.27 = -0.81x + 45.58
x = 5.34
Performance Verification of the Analytical System
For the performance verification of the analytical system a reference study was conducted, were the surface tension of the n-heptane was determined on the 2019-06-13 to be 20.22 ± 0.05 mN/m (20 °C) for the platinum iridium ring RI 21 (internal no. 1) and is within the acceptable range of 20.23 ± 0.22 mN/m.
Validity Criteria
The temperatures of the test solutions were 20 ± 0.5 °C.
Conclusion
The determination of the critical micelle concentration of the test item resulted in a value of: 5.34 mg/L (20 °C)
Description of key information
The substance is surface active according to EU Method A.5
Key value for chemical safety assessment
Additional information
A surface tension range in water of 37.09 mN/m (conc. 10 mg/L) to 53.23 mN/m (conc. 1 mg/L) was determined for the test item (OECD Guideline 115, OECD harmonised ring method)
Therefore, the substance should be regarded as surface active, according to EU Method A.5.
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.
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