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EC number: 264-761-2 | CAS number: 64265-45-8
- 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
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2007-03-19 to 2007-06-20
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Version / remarks:
- EEC Publication no. L383, December 29, 1992
- Deviations:
- yes
- Remarks:
- see "Principles of method if other than guideline"
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Version / remarks:
- April 13, 2004
- Deviations:
- yes
- Remarks:
- see "Principles of method if other than guideline"
- Principles of method if other than guideline:
- According to guidelines, the determination of the Pow of the test substance should be performed in its non-ionised form. Therefore, the pKa values of the test substance were calculated using Perrin calculation method (pKalc 5.0, module in Pallas 3.0, CompuDrug International). These calculations show that there is not a pH at which all ionisable groups are in their non-ionised form. At pH 2, net charge of the test substance is zero and therfore it was descided to perform a test at this pH. However, this pH was not in the environmentally relevant range of pH 5.0-9.0. Thus, an additional test was performed at neutral pH. Under these conditions, the net charge will deviate from zero.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- 1.1
- Temp.:
- 22 °C
- pH:
- 7
- Remarks on result:
- other: weighted mean
- Type:
- log Pow
- Partition coefficient:
- < 0.3
- Temp.:
- 22 °C
- pH:
- 7
- Remarks on result:
- other: component 1, 52% area
- Type:
- log Pow
- Partition coefficient:
- >= 1.1 - <= 2.8
- Temp.:
- 22 °C
- pH:
- 7
- Remarks on result:
- other: component 2, 46% area
- Type:
- log Pow
- Partition coefficient:
- 4.1
- Temp.:
- 22 °C
- pH:
- 7
- Remarks on result:
- other: component 3, 1.1% area
- Conclusions:
- The log Pow of Amphopropionate C8 is in the range of < 0.3 to 4.0 at pH 2.0 and < 0.3 to 4.1 at pH 7.0.
- Executive summary:
The n-octanol/water partition coefficient of Amphopropionate C8 was determined according to OECD Guideline 117 (13 April 2004) and EU Method A.8 (29 December 1992) using the HPLC method. According to guidelines, the determination of the Pow of the test substance should be performed in its non-ionised form. Therefore, the pKa values of the test substance were calculated using Perrin calculation method (pKalc 5.0, module in Pallas 3.0, CompuDrug International). These calculations show that there is not a pH at which all ionisable groups are in their non-ionised form. At pH 2, net charge of of the test substance is zero and, thus, the test was performed at this pH. However, because this pH was not in the environmentally relevant range of pH 5.0-9.0, an additional test was performed at neutral pH. Under these conditions, the net charge will deviate from zero.
In the chromatograms of the test substance solutions, several test substance peaks were observed. Some peaks were broad indicating not pure reverse phase retention as required for accurate determination of Pow. Because a different method to determine Pow is not applicable, these values were reported as a range. The log Pow of Amphopropionate C8 is, for the different components, in the range of < 0.3 to 4.0 at pH 2.0 and < 0.3 to 4.1 at pH 7.0.
Reference
In the chromatogram of the test substance solution, several test substance peaks were observed. Some peaks were broad indicating not pure reversed phase retention as required for accurate determination of Kow. Because a different method to determine Kow is not applicable, the Pow of these peaks were reported as a range.
Test substance peak |
pH |
log Kow |
Peak area [%] |
Component 1 |
2 |
<0.3 |
28 |
Component 2 |
2 |
2.7 |
23 |
Component 3 |
2 |
2.9 – 4.0 |
48 |
Component 4 |
2 |
4.2 |
1.7 |
Component 1 |
7 |
<0.3 |
52 |
Component 2 |
7 |
1.1 – 2.8 |
46 |
Component 3 |
7 |
4.1 |
1.1 |
Description of key information
< 0.3 to 4.0 at pH 2.0 and < 0.3 to 4.1 at pH 7.0 for the different compounds; weighted mean: 1.1 (OECD TG 117 / EU method A.8; RL1; GLP)
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 1.1
- at the temperature of:
- 22 °C
Additional information
The n-octanol/water partition coefficient of Amphopropionate C8 was determined according to OECD Guideline 117 (13 April 2004) and EU Method A.8 (29 December 1992) using the HPLC method. According to guidelines, the determination of the Pow of the test substance should be performed in its non-ionised form. Therefore, the pKa values of the test substance were calculated using Perrin calculation method (pKalc 5.0, module in Pallas 3.0, CompuDrug International). These calculations show that there is not a pH at which all ionisable groups are in their non-ionised form. At pH 2, net charge of of the test substance is zero and, thus, the test was performed at this pH. However, because this pH was not in the environmentally relevant range of pH 5.0-9.0, an additional test was performed at neutral pH. Under these conditions, the net charge will deviate from zero.
In the chromatograms of the test substance solutions, several test substance peaks were observed. Some peaks were broad indicating not pure reverse phase retention as required for accurate determination of Pow. Because a different method to determine Pow is not applicable, these values were reported as a range. The log Pow of Amphopropionate C8 is, for the different components, in the range of < 0.3 to 4.0 at pH 2.0 and < 0.3 to 4.1 at pH 7.0.
A weighted average mean value of 1.1 was calculated based on the respective peak area percentages.
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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