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EC number: 243-077-8 | CAS number: 19455-20-0
- 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
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 7 February 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- OECD harmonised ring method
Test material
- Reference substance name:
- Potassium isobutyrate
- EC Number:
- 243-077-8
- EC Name:
- Potassium isobutyrate
- Cas Number:
- 19455-20-0
- Molecular formula:
- C4H8O2.K
- IUPAC Name:
- potassium 2-methylpropanoate
- Test material form:
- solid: particulate/powder
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: sponsor/181101001
- Expiration date of the lot/batch: 31 October 2020
- Purity test date: 01 Nov 2018
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Room Temperature (20 ± 5 °C); Keep away from humidity
- Stability under test conditions: stable
- Solubility and stability of the test substance in the solvent/vehicle:
Stability in solvents: H2O: 96h; EtOH: unknown; acetone: unknown; CH3CN: unknown; DMSO: unknown
Solubility in solvents: H2O: > 1 g/L; EtOH: unknown; acetone: unknown; CH3CN: unknown; DMSO: unknown
Results and discussion
Surface tension
- Key result
- Surface tension:
- >= 72.18 - <= 72.94 N/m
- Temp.:
- 19.8 °C
- Conc.:
- 1 g/L
Any other information on results incl. tables
The test item solution was held at constant temperature (20.0 ± 0.1 °C). 60 minutes after conclusion of the first measurement series, a second measurement series was performed for verification purposes.
The following values were recorded:
Measured Values Test Item First Series
Measurement |
Time |
Mass |
Surface Tension |
Temperature |
No |
s |
g |
mN/m |
°C |
1 |
4.2 |
0.2990 |
72.94 |
19.9 |
2 |
5.1 |
0.2985 |
72.82 |
19.9 |
3 |
6.2 |
0.2973 |
72.53 |
19.9 |
4 |
7.1 |
0.2970 |
72.45 |
19.9 |
5 |
8.2 |
0.2980 |
72.70 |
19.9 |
6 |
9.1 |
0.2976 |
72.60 |
19.9 |
7 |
10.2 |
0.2973 |
72.53 |
19.9 |
8 |
11.1 |
0.2972 |
72.50 |
19.9 |
9 |
12.2 |
0.2975 |
72.57 |
19.9 |
10 |
13.1 |
0.2970 |
72.45 |
19.9 |
Mean |
72.61 |
|
||
Standard Deviation |
0.16 |
|
Measured Values Test Item Second Series
Measurement |
Time |
Mass |
Surface Tension |
Temperature |
No |
s |
g |
mN/m |
°C |
1 |
4.2 |
0.2972 |
72.50 |
20.0 |
2 |
5.2 |
0.2963 |
72.28 |
20.0 |
3 |
6.2 |
0.2971 |
72.48 |
20.0 |
4 |
7.2 |
0.2959 |
72.18 |
20.0 |
5 |
8.1 |
0.2973 |
72.53 |
20.0 |
6 |
9.2 |
0.2971 |
72.48 |
20.0 |
7 |
10.2 |
0.2974 |
72.55 |
20.0 |
8 |
11.2 |
0.2966 |
72.35 |
20.0 |
9 |
12.2 |
0.2964 |
72.31 |
20.0 |
10 |
13.2 |
0.2973 |
72.53 |
20.0 |
Mean |
72.42 |
|
||
Standard Deviation |
0.13 |
|
After the first and the second measurement series, the difference between mean values was less than 5%. Therefore no additional measurement series was required.
Applicant's summary and conclusion
- Conclusions:
- The values of the single determinations show no significant difference (0.26% between mean values of the two measurement series). All measured values lay clearly above the threshold for surface tension which is stated in the guidelines.
The surface tension of the negative control was determined with a difference of 0.31 % from the stated literature value.
Therefore, the result of the test is considered valid and the test item Potassium isobutyrate is classified as “not surface active” in a concentration of 1.00 g/L.
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