Zirconium dinitrate oxide

Density

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2014-11-12

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.987

Temp.:

20 °C

First step - Determination of the density of the immersion liquid (IL)

The density of the immersion liquid (IL), being silicone oil, has first to be calculated, using the equation and the parameters below, in order to calculate the density of the test item in a second step:

Equation: density (IL) = m(IL)/m(water) x density(water, at T °C)

With:

m = mass (kg);

density = density (kg/m³);

density(water, at T °C) = m(water) / volume of pycnometer

 

Mass of empty pycnometer: 20.92 g

Volume of pycnometer: 25.0 mL

Mass of water & pycnometer: 45.92 g

Mass of water: 45.92 – 20.92 = 25 g

Density of water: 25 / 25 = 1.000 g/cm³

Mass of IL & pycnometer: 44.61 g

Mass IL in pycnometer (m1): 44.61 – 20.92 = 23.69 g

Calculated density of IL: 23.69 / 25 x 1 = 0.948 g/cm³

Density of IL: 948 kg/m³

Second step - Determination of the density of the sample (S)

The density of the test item is then calculated using the equation and the parameters below:

Equation: density(S) = (m(S) x density(IL)) / (m1 - m2)

With:

density = density (kg/m³),

m(S) = mass of sample (kg),

m1 = mass of immersion liquid required to fill the pycnometer (kg),

m2 = mass of immersion liquid required to fill the pycnometer containing the sample (kg)

Assay number	1	2
Mass of empty pycnometer	20.92 g	20.92 g
Mass of sample & pycnometer	44.32 g	43.95 g
Mass of sample added to empty pycnometer (m(S))	23.40 g	23.03 g
Mass of sample, pycnometer & immersion liquid	56.79 g	56.71 g
Mass of immersion liquid added (m2)	12.47 g	12.76 g
Calculated density of sample	1.977 g/cm³	1.997 g/cm³
Density of Sample	1977 kg/m³	1997 kg/m³
Mean Result	1987 kg/m³

                                                

Conclusions:

The relative density of the substance zirconium dinitrate oxide was determined to be 1.987 at 20°C.

Reference 2

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

17 October 2017

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

Key result

Type:

relative density

Density:

2.302

Temp.:

20.1 °C

Remarks on result:

other: Mean value of two assays (assay No.1: 2.312 at 20.4°C, assay No.2: 2.291 at 19.7°C)

Assay No. 1

Test item sample weight (M_E): 10.0400 g

Reference volume (V_A):   79.444 cm³

Volume of sample cell holder (V_C): 27.678 cm³

Temperature during the assay: 20.4°C

Data	P2 (PSIG)	P3  (PSIG)	Vp (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run No. 4	17.059	3.873	4.3437	2.3114	2.3115	2.312 ± 0.002
Run No. 5	17.123	3.888	4.3400	2.3134	2.3134
Run No. 6	17.175	3.899	4.3463	2.3100	2.3101

The runs Nos. 1, 2 and 3 were not taken into account; they did not comply with the quality criteria.

Assay No. 2

Test item sample weight (M_E): 10.0862 g

Reference volume (V_A):   79.444 cm³

Volume of sample cell holder (V_C): 27.678 cm³

Temperature during the assay: 19.7°C

Data	P2 (PSIG)	P3  (PSIG)	Vp (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run No. 3	17.031	3.859	4.4033	2.2906	2.2907	2.291 ± 0.001
Run No. 4	17.097	3.874	4.4029	2.2908	2.2908
Run No. 5	17.140	3.884	4.4010	2.2918	2.2919

The runs Nos. 1 and 2 were not taken into account; they did not comply with the quality criteria.

Conclusions:

Based on the tests performed, the mean relative density of the test item was 2.302 ± 0.011 at 20.1°C.

Description of key information

Based on a weight of evidence approach using two reliable (Klimisch) guideline studies (Younis, 2015a; Demangel, 2017), the relative density can be concluded to range from 1.987 to 2.302 at room temperature, depending on the Zr:nitrate ratio as specified in the Substance Identification Profile.

Additional information

In a GLP study performed in accordance with EC test method A.3, the density of zirconium dinitrate oxide was determined to be 1987 kg/m3 at 20°C, applying the pycnometer method (Younis, 2015a), yielding a value for relative density of 1.987. This study was considered as reliable (Klimisch 1). The zirconium dinitrate oxide sample tested represented a sample with the lowest Zr:nitrate ratio according to the range specified by the Substance Identification Profile. Another GLP study performed in accordance with EC test method A.3, using a sample with a Zr:nitrate ratio near the upper end of the range specified in the Substance Identification Profile (Demangel, 2017, Klimisch 1) yielded a relative density of 2.302 at 20.1°C. These two studies are considered in a weight of evidence approach to define a relative density range relevant for the substances within the Zr:nitrate ratio range specified in the Substance Identification Profile.