Disodium ar,ar'-[(9,10-dihydro-9,10-dioxo-1,4-anthrylene)diimino]bis[(4-chlorophenoxy)benzenesulphonate]

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 28, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Version / remarks:

adopted on 2 October 2012

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Type:

relative density

Density:

1.33

Temp.:

20 °C

DETERMINATION OF DENSITY OF TEST ITEM

Replication Number	Weight of Test Item (g)	Volume of Pycnometer (ml)	Volume of Wetting Solution (ml)	Density of Test Item (g/ml)	SD (±)	RSD (%)
1	40.6135	49.7652	19.34	1.3349	-	-
2	40.9104	49.9681	19.2156	1.3303	-	-
Mean	40.7619	49.8666	19.2778	1.3326	0.003	0.23

DETERMINATION OF VOLUME OF WETTING SOLUTION

Replication Number	Weight of Empty Pycnometer (g)	Weight of Pycnometer with Test Item and Wetting Solution (g)	Weight of Pycnometer with Test Item (g)	Weight of Test Item (g)	Volume of Wetting Solution (ml)
1	30.4787	87.7149	71.0922	40.6135	19.3400
2	30.2272	87.6688	71.1376	40.9104	19.2156
Mean	30.3529	87.6918	71.1149	40.7619	19.2778

DETERMINATION OF WATER EQUIVALENT AND VOLUME OF PYCNOMETER AT 20 °C

Replication Number	Weight of Empty Pycnometer	Weight of Pycnometer with Water	Water Equivalent Weight	Volume of the Pycnometer at 20 °C (ml)
1	30.4787	80.1444	49.6657	49.7652
2	30.2272	80.0954	49.8682	49.9681
Mean	30.3529	80.1199	49.7669	49.8666

DETERMINATION OF DENSITY OF WETTING SOLUTION

Replication Number	Weight of Empty Pycnometer	Weight of Pycnometer with Wetting Solution	Weight of Wetting Solution (g)	Volume of Pycnometer (ml) at 20 °C	Density of Wetting Solution (g/ml)
1	30.4787	73.2517	42.7730	49.7652	0.8595
2	30.2272	73.2165	42.9893	49.9681	0.8603
Mean	30.3529	73.2341	42.8811	49.8666	0.8599

Conclusions:

Relative density: 1.33 at 20 °C

Executive summary:

The density of the test item was determined in accordance with OPPTS 830.7300 and OECD guideline No. 109.

The empty pyknometer, pyknometer with water, pyknometer with wetting solution, pyknometer with 2/3 of test item and pyknometer with 2/3 of test item and wetting solution were weighed and the weights were recorded to find out the water equivalent and the volume of the pyknometer. The density of the wetting solution, volume of wetting solution and density of the test item were calculated from the water equivalent and the volume of the pyknometer. The test was performed at 20 °C, under thermostatic conditions.

The density values resulted to be 1.3349 g/ml and 1.3303 g/ml for replicates R1 and R2, respectively; the calculated mean density value of the replicates was found to be 1.3326 ± 0.03 g/ml with 0.23 % of RSD.

The relative density resulted to be 1.33 at 20 °C.

Conclusion

Relative density: 1.33 at 20 °C

Description of key information

1.33 at 20 °C

Key value for chemical safety assessment

Relative density at 20C:

1.33

Additional information

OECD 109 - pycnometer method