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EC number: 945-075-9 | CAS number: -
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 22 September 2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Version / remarks:
- ECC Publication No. L383, December 1992
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- Version / remarks:
- Adopted July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7300 (Density / Relative Density / Bulk Density)
- Version / remarks:
- June 2002
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Other quality assurance:
- other: Chemikaliengesetz ('Chemicals Act') der Bundesrepublik Deutschland (ChemG), Anhang 1 ('Annex 1'), 2008 and Directive 2004/10/EC of 11 February 2004 (Official Journal No. L 50/44)
- Type of method:
- pycnometer method
- Dynamic viscosity of test material:
- Not reported
- Key result
- Type:
- relative density
- Density:
- 1.068 g/cm³
- Temp.:
- 20 °C
- Remarks on result:
- other: Mean of runs 1 - 6. Standard deviation: 0.001
- Conclusions:
- The mean relative density of the test item was determined to be 1.068 (± 0.001) at 20 ± 1 °C using the gas pycnometer method.
- Executive summary:
The relative density of the test item was determined in an EC A.3 method, OECD 109 and OPPTS 830.1770 guideline study using the gas comparison pycnometer method. The volume of the sample and reference cells was calculated using two calibration balls with a known volume as reference. The calibration procedure involved three separate measurements. The test procedure was repeated using different test item samples until a repeatability of < ± 0.02 g/cm3 was reached. The mean relative density of the test item was determined to be 1.068 (± 0.001) at 20 ± 1 °C.
The study is a GLP compliant guideline experimental study, fully adequate for assessment of this endpoint.
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21 March 2018 to 12 April 2018
- 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)
- Type of method:
- pycnometer method
- Type:
- relative density
- Density:
- 1.01 other: unitless
- Temp.:
- 20 °C
- Conclusions:
- The relative density of the test item was determined to be 1.01 at 20 °C.
- Executive summary:
The relative density of the test item was determined in a study following OECD 109 and EC Method A.3 guidelines, using the pycnometer method. The relative density of the test item was determined to be 1.01 at 20 °C.
The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.
Referenceopen allclose all
The determination of the relative density was performed by three-fold measurements of two independent test samples.
Table 1: Determination of the Density of the test item
| Measurement | Temperature (°C) | Sample cell empty (g) | Sample cell filled (g) | Amount of test item | Pressure p11 (psi) | Pressure p21 (psi) | Sample Volume2 (cm3) | Density3 (g/cm3) |
| 1 | 20.9 | 4.117 | 11.8666 | 7.7496 | 16.046 | 5.660 | 7.270892 | 1.066 |
| 2 | 20.9 | 4.117 | 11.8666 | 7.7496 | 16.095 | 5.675 | 7.257554 | 1.068 |
| 3 | 21.2 | 4.117 | 11.8666 | 7.7496 | 16.146 | 5.692 | 7.251833 | 1.069 |
| mean4 | 1.068 | |||||||
| SD | 0.002 | |||||||
| 4 | 21.1 | 4.1167 | 12.1291 | 8.0124 | 16.149 | 5.739 | 7.517266 | 1.066 |
| 5 | 20.9 | 4.1167 | 12.1291 | 8.0124 | 16.120 | 5.722 | 7.478787 | 1.071 |
| 6 | 21 | 4.1167 | 12.1291 | 8.0124 | 16.106 | 5.720 | 7.495882 | 1.069 |
mean4 |
1.069 |
|||||||
SD |
0.003 |
|||||||
mean5 |
1.068 |
|||||||
SD |
0.001 |
|||||||
1 pressure readings obtained after pressurising the sample cell filled with test item
2 3 see calculations included in any other information on materials and methods
4 mean of replicate measurements
5 mean of independent sample values
SD standard deviation
Table 1: Results of relative density study
| Parameter | Replicate 1 | Replicate 2 |
| w1 | 24.00717 | 25.01722 |
| w2 | 48.98355 | 49.72920 |
| w3 | 44.26941 | 45.06167 |
| w4 | 27.01838 | 28.03092 |
| w5 | 44.87773 | 45.67259 |
| W1 | 24.97638 | 24.71198 |
| W2 | 20.26224 | 20.04445 |
| W3 | 3.01121 | 3.01370 |
| W4 | 17.85935 | 17.64167 |
W5 |
2.40289 |
2.40278 |
|
|
|
ptl |
0.8096 |
0.8095 |
Mean ptl |
0.8096 |
|
Vs |
2.968 |
2.968 |
Dt4 |
1.01 |
1.02 |
Mean Dt4 |
1.01 |
|
Where:
w1= weight of empty pycnometer (g)
w2= weight of pycnometer and water (g)
w3= weight of pycnometer and displacement liquid (g)
w4= weight of pycnometer and test item (g)
w5= weight of pycnometer, test item and displacement liquid (g)
W1 = Mass of water to fill pycnometer
W2 = Mass of displacement liquid to fill pycnometer
W3 = Mass of test item added to pycnometer
W4 = Mass of displacement liquid required to fill pycnometer containing W3g of test item
W5 = Mass of displacement liquid equivalent to W3g of test item
ptl= density of displacement liquid at temperature of determination (g/mL)
Dt4= relative density of test item at test temperature compared to water at 4°C
Description of key information
The relative density of the test item was determined was determined to be 1.01 to 1.07 at 20 ± 1 °C.
Key value for chemical safety assessment
- Relative density at 20C:
- 1.068
Additional information
The relative density of the test item was determined in two studies, one following EC A.3 method, OECD 109 and OPPTS 830.1770, using the gas comparison pycnometer method (Fieseler 2009b) and one following EC A.3 method study and OECD 109, alos using the pycnometer method (Dunning 2018). The mean relative density of the test item was determined to be in the range 1.01 to 1.068 at 20 ± 1 °C (Dunning 2018 and Fieseler 200b).
The studies are both GLP compliant, guideline experimental studies and are fully adequate for assessment of this endpoint.
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