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Diss Factsheets
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EC number: 236-004-6 | CAS number: 13092-66-5
- 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
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Date of inspection: 10 July 2012, Date of signature: 7 September 2012
- Type of method:
- pycnometer method
- Remarks:
- referred to as a 'gas comparison pyconometer' in the study report.
- Type:
- density
- Density:
- 2 450 kg/m³
- Temp.:
- 21.6 °C
- Remarks on result:
- other: Temperature: 21.6 ± 0.5 °C
- Type:
- relative density
- Density:
- 2.45
- Temp.:
- 21.6
- Remarks on result:
- other: 21.6 ± 0.5 °C
- Conclusions:
- The density of the test item has been determined to be 2.45 x 103 kg/m3 at 21.6 ± 0.5 °C, relative density 2.45.
Reference
Calibration
The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:
Table 1.
Determination |
P1 |
P2 |
P3 |
P4 |
Reference Cell Volume (cm3) |
Sample Cell Volume (cm3) |
1 |
17.075 |
6.453 |
17.019 |
8.413 |
90.768 |
149.409 |
2 |
17.018 |
6.440 |
17.021 |
8.424 |
90.929 |
149.356 |
3 |
17.028 |
6.444 |
17.025 |
8.427 |
90.907 |
149.310 |
Sample
The pressure readings, calculated volumes and density values obtained for the test item are shown in the following table:
Table 2.
Determination |
Test |
P1 |
P2 |
Volume (cm3) |
Density (kg/m3) |
Mean Density (kg/m3) |
1 |
A |
17.032 |
6.650 |
7.495 |
2.54 x 103 |
2.47 x 103 |
B |
17.011 |
6.651 |
7.817 |
2.44 x 103 |
||
C |
17.014 |
6.653 |
7.846 |
2.43 x 103 |
||
2 |
A |
17.014 |
6.649 |
7.706 |
2.46 x 103 |
2.43 x 103 |
B |
17.074 |
6.677 |
7.865 |
2.41 x 103 |
||
C |
17.028 |
6.660 |
7.899 |
2.40 x 103 |
Temperature: 21.6 ± 0.5 ºC
Mean density: 2.45 x 103 kg/m3
Relative density: 2.45
Although testing would be preferable at 20 °C, the absence of methods of temperature control for the relevant apparatus meant this was not possible. However, as the EC A3 method guideline requires that the determination of density of solids is to be performed “at room temperature” and with the negligible influence of temperature on the density of solids, this was considered not to affect the validity of the result.
The mass density of a material varies with temperature and pressure and this variance is typically negligible for solids. Increasing the temperature of a substance may decrease its density by increasing the volume of that substance. Typical thermal expansion coefficients of solids are in the order of 10−5 °C−1, and the volumetric expansion of stainless steel (used as calibration spheres) at 20 °C is approximately 5.2 x 10-5 °C−1. Thus, a change in temperature of several degrees will have no significant effect on the volume and hence the density of a solid substance.
Thus, although relative density is defined using the density at 20 °C it is considered that the effect of temperature within normal laboratory conditions will not have a significant impact on either the determined density or calculated relative density.
Description of key information
One key study exists. This study (Tarran D, 2012) was conclusive, done to a valid guideline (OECD 109) and the study was conducted under GLP conditions. It is therefore scientifically justified for use as a key study under Regulation (EC) No. 1907/2006 (REACH).
Key value for chemical safety assessment
- Relative density at 20C:
- 2.45
Additional information
The density of the test item has been determined to be 2.45 x 103 kg/m3 at 21.6 ± 0.5 °C, relative density 2.45.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.