Registration Dossier
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EC number: - | CAS number: -
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Remarks:
- density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16 September 2015 to 09 December 2015
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- pycnometer method
- Type:
- density
- Density:
- 909 kg/m³
- Temp.:
- 20 °C
- Key result
- Type:
- relative density
- Density:
- 0.909 other: dimensionless
- Temp.:
- 20 °C
- Conclusions:
- The density of the test item has been determined to be 909 kg/m3 at 20.0 ± 0.5 °C and a relative density of 0.909
- Executive summary:
GUIDELINE
Relative density was determined using a procedure designed to be compatible with Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012, and Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.
METHOD
Relative density was determined using the gas comparison pycnometer method. After suitable calibration using reference cells, a test sample was measured in triplicate at 20 °C, and the mean relative density was calculated.
RESULTS
Reproducibility of less than ± 20 kg/m3 was obtained during two determinations.
CONCLUSION
The density of the test item was determined to be 909 kg/m3 at 20.0 ± 0.5 °C and a relative density of 0.909.
- Endpoint:
- relative density
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Reason / purpose for cross-reference:
- read-across source
- Type:
- density
- Density:
- 909 kg/m³
- Temp.:
- 20 °C
- Key result
- Type:
- relative density
- Density:
- 0.909 other: dimensionless
- Temp.:
- 20 °C
Referenceopen allclose all
CALIBRATION
- Pressure readings and the calculated volume for the reference and sample cells are shown in Table 3.4 (attached).
- As the reference cell volume and sample cell volume were within the defined tolerances (90.953± 1.0 cm3 and 149.225± 1.0 cm3 for the reference and sample cells respectively), the gas compression pycnometer was considered acceptable for use.
SAMPLE
- The mass of the vessel, vessel and test item, and the calculated mass of test item are shown in Table 3.6 (attached).
- Pressure readings obtained for the vessel and vessel containing test item are shown in Table 3.7 (attached).
- The calculated volumes and density obtained are shown in Table 3.8 (attached).
DISCUSSION
- Due to the test item's viscosity, it was considered that the pycnometer method for liquids would be impractical.
- Therefore, test item was transferred into glass vessels which would fit inside the sample cell of the gas comparison pycnometer and melted
- The samples were then allowed to solidity by equilibration to 20°C for at least one hour.
- Two determinations were performed to ensure a reproducibility of less than±20 kg/m3 was obtained.
Description of key information
The density of the analogue test item was determined to be 909 kg/m3 at 20.0 ± 0.5 °C with a relative density of 0.909.
Key value for chemical safety assessment
- Relative density at 20C:
- 0.909
Additional information
GUIDELINE
Relative density was determined using a procedure designed to be compatible with Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012, and Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.
METHOD
Relative density was determined using the gas comparison pycnometer method. After suitable calibration using reference cells, a test sample was measured in triplicate at 20 °C, and the mean relative density was calculated.
RESULTS
Reproducibility of less than± 20 kg/m3 was obtained during two determinations.
CONCLUSION
The density of the analogue test item was determined to be 909 kg/m3 at 20.0 ± 0.5 °C with a relative density of 0.909.
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