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EC number: 209-156-6 | CAS number: 557-09-5
- 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
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017-11-24 to 2018-01-30
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Version / remarks:
- 1995
- Deviations:
- yes
- Remarks:
- Exclusion of CO2 and O2, two vessels was set up in a parallel design at 20 ± 1 °C, each vessel was sampled several times instead of sampling one vessel at every time point.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Version / remarks:
- 2008
- Deviations:
- yes
- Remarks:
- Exclusion of atmospheric CO2 and O2, two vessels was set up in a parallel design at 20 ± 1 °C, each vessel was sampled several times instead of sampling one vessel at every time point.
- GLP compliance:
- yes
- Type of method:
- flask method
- Specific details on test material used for the study:
- Conditions of storage: Store at a dry place at room temperature (10°C – 30°C), in original container
Handling: Please handle the substance as far as possible under inert gas. - Water solubility:
- 376 mg/L
- Conc. based on:
- test mat.
- Loading of aqueous phase:
- 2 010 mg/L
- Incubation duration:
- <= 8 d
- Temp.:
- 20 °C
- pH:
- >= 6.6 - <= 6.9
- Conclusions:
- Under the conditions of this test (under exclusion of CO2 and O2, under inert gas; flask method; loadings of 2000.0 mg and 2019.5 mg test substance/L), a solubility equilibrium was reached during the first both days of testing. The mean measured amount of dissolved zinc on day 1, 2, 7 and 8 at 20 ± 1 °C is 69.9 mg/L (determined as dissolved zinc, separated by filtration from undissolved test item). This corresponds to a water solubility of dissolved zinc dioctanoate of 376 mg/L, calculated on a zinc content of 18.6 %. Solution pH in samples containing the test item remained at 6.6 – 6.9 while the pH in method blanks ranged from 7.3 – 7.5.
Reference
Preliminary test
The preliminary test showed a water solubility of "Zinc dioctanoate" of approximately 400 mg / L at 20 °C after measuring the content of zinc in the filtered solutions outside GLP.
Therefore it was decided to carry out the main test with a loading rate of approximately 2,000 mg test item / L.
Main test
The temperature of the water bath was 20 ± 1 °C.
The pH of the test solutions were in the range of 6.6 and 6.9 whereas the pH values of the blanks were in the range of 7.3 and 7.5.
Measured dissolved zinc concentrations of solutions containing the test item do not continuously increase during the test (sampling at day 1, 2, 7 and 8) but vary from 67.4 to 74.7 µg zinc / L. Measured dissolved zinc concentrations of control solutions (i.e. background concentrations) are below the limit of quantification (LOQ).
Based on the zinc content of zinc dioctanoate of 18.6 %, mean water solubility is estimated with 376 mg zinc dioctanoate/ L.
Calculated water solubility of zinc dioctanoate
Equilibration time (Days) | Water solubility in mg zinc dioctanoate / L | ||||
Blank | 1st |
2nd |
Mean (1st & 2nd) |
||
1 |
< 1.29 |
384 |
362 |
373 |
|
2 |
< 1.29 |
402 |
382 |
392 |
|
7 |
< 1.29 |
367 |
369 |
368 |
|
8 |
< 1.29 |
369 |
370 |
370 |
|
Mean |
< 1.29 |
381 |
371 |
376 |
|
Standard deviation |
--- |
16 |
8 |
11 |
|
Relative standard deviation (%) | --- |
4.3 |
2.2 |
3.0 |
Description of key information
Zinc dioctanoate has a water solubility of 376 mg/L at 20 °C.
Key value for chemical safety assessment
- Water solubility:
- 376 mg/L
- at the temperature of:
- 20 °C
Additional information
Under the conditions of this test (under exclusion of CO2and O2, under inert gas; flask method; loadings of 2000.0 mg and 2019.5 mg test substance/L), a solubility equilibrium was reached during the first both days of testing. The mean measured amount of dissolved zinc on day 1, 2, 7 and 8 at 20 ± 1 °C is 69.9 mg/L (determined as dissolved zinc, separated by filtration from undissolved test item). This corresponds to a water solubility of dissolved zinc dioctanoate of 376 mg/L, calculated on a zinc content of 18.6 %. Solution pH in samples containing the test item remained at 6.6 – 6.9 while the pH in method blanks ranged from 7.3 – 7.5.
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