Lanthanum trihydroxide

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

17 August 2012

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:

air comparison pycnometer (for solids)

Type:

density

Density:

4 270 kg/m³

Temp.:

21.5 °C

Table 1: Pressure Readings and the Calculated Volumes of the Reference and Sample Cells used in Calibration

Determination	p1 (psi)	p2 (psi)	p3 (psi)	p4 (psi)	Reference Cell Volume (cm³)	Sample Cell Volume (cm³)
1	17.025	6.444	17.191	8.520	90.600	148.765
2	17.082	6.473	17.041	8.446	91.030	149.195
3	17.010	6.447	17.013	8.434	91.041	149.166

 

Table 2: Pressure Readings, Calculated Volumes and Density Values Obtained for the Test Material

Determination	Test	p1 (psi)	p2 (psi)	Volume (cm³)	Density (kg/m³)	Mean Density (kg/m³)
1	A	17.127	6.607	4.321	4580*	4300
	B	16.977	6.560	4.711	4200
	C	17.065	6.588	4.497	4400
2	A	17.029	6.563	4.099	4830*	4270
	B	17.048	6.585	4.624	4280
	C	17.041	6.583	4.650	4250
3	A	17.063	6.588	4.525	4370	4250
	B	17.011	6.574	4.742	4170
	C	17.017	6.575	4.695	4210

*Value not used in final results

Temperature: 21.5 ± 0.5 °C

Mean density: 4270 kg/m³

 

Discussion

A third determination was performed as it was considered that test A for samples 1 and 2 were inconsistent with the other results. This may have been due to the system not being fully purged prior to taking the pressure measurements. Therefore, these values were not used in the determination of overall means.

Conclusions:

The density of the test material has been determined to be 4270 kg/m³ at 21.5 ± 0.5 °C.

Executive summary:

The density of the test material was determined in accordance with the standardised guidelines OECD 109 and EU Method A.3.

Using a gas comparison pycnometer, the density of the test material has been determined to be 4270 kg/m³ at 21.5 ± 0.5 °C.

Description of key information

The density of the test material is 4270 kg/m³.

Key value for chemical safety assessment

Relative density at 20C:

4.27

Additional information

The key study was conducted in line with GLP and in accordance with the standardised guidelines OECD 109 and EU Method A. It was well reported and adhered to sound scientific principles. It was awarded a reliability score of 1 in accordance with the criteria of Klimisch (1997).

The density of the test material has been determined to be 4270 kg/m³ at 21.5 ± 0.5 °C using a gas comparison pycnometer.