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Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-03-23 to 2010-04-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
, 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2009-11-26
Type of method:
air comparison pycnometer (for solids)
Type:
relative density
Density:
3.31
Temp.:
22 °C
Remarks on result:
other: Variation of temperature was ± 1.0 °C
Conclusions:
The relative density of the test item has been determined to be 3.31 at 22.0 ± 1.0 °C. The deviation from the nominal temperature (20 °C) does not significantly affect the accuracy of the density value.

Description of key information

Relative density (compared to water at 4 °C) is D4R= 3.31 (22 °C) (study result,EU A.3 method). The deviation from the nominal temperature (20 °C) does not significantly affect the density value.

The relative density of calcium carbonate, based on a weight of evidence using data from several peer reviewed handbooks, is 2.7. Thus it may be expected that grades of calcium oxide with up to 35% calcium carbonate will have a relative density similar to the key value.

Key value for chemical safety assessment

Relative density at 20C:
3.31

Additional information

For the evaluation of this endpoint, the result from a guideline conform study (Fox, 2010; EU A.3 method) was used as key information supported by data from two other guideline conform studies (Remnant, 2007a and Remnant, 2007b).The key study was selected on the basis that this study was conducted for the registration under REACH with a sample considered as representative for joint registration of calcium oxide. The relative density of calcium carbonate, based on a weight of evidence using data from several peer reviewed handbooks, is 2.7. Thus it may be expected that grades of calcium oxide with up to 35% calcium carbonate will have a relative density similar to the key value.

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