Registration Dossier

Administrative data

Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August to november 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The determination was carried out by a gas comparison pycnometer method, using a procedure designed to be compatible with Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
yes (incl. certificate)
Type of method:
pycnometer method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline
Details on test material:
White powder
Specific details on test material used for the study:
Batch 18114773 - Purity > 99.5%
Instrument: Multi-Pycnometer, Quantachrome, Syosset, N.Y., USA
Calibration sphere: A stainless steel sphere with a known volume (Vcal = 56.559 cm3)
Gas: Helium

Results and discussion

Densityopen allclose all
Key result
Type:
relative density
Density:
ca. 1.33
Temp.:
20 °C
Type:
density
Density:
ca. 1 330 kg/m³
Temp.:
20 °C

Applicant's summary and conclusion

Conclusions:
Duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m3 was obtained.
The mass density of a substance 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 thevolume 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. Therefore, a change in temperature of several degrees will have no significant effect on the volume and hence the density of a solid substance.
Therefore, it was considered that the difference in temperature between 20.0 °C and normal laboratory conditions did not have a significant

The density of the test item has been determined to be 1.23 x 10E3 kg/m3 at 19.0 ± 1.0 °C; relative density: 1.23.
Executive summary:

The density of the test item has been determined to be 1.23 x 10E3 kg/m3 at 19.0 ± 1.0 °C; relative density: 1.23.