Dipotassium hexacyanocobalt(II)-ferrate(II)

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

24.5.-11.9.2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

A gas comparison pycnometer method designed to be compatible with Method A3 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 was used for the determination of the density. The study is GLP compliant.

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

yes

Remarks:

The density was determined at 22.6 Celsius and 22.0 Celsius.

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

yes

Remarks:

The density was determined at 22.6 Celsius and 22.0 Celsius.

GLP compliance:

yes (incl. QA statement)

Remarks:

Certificate is included in the study report.

Type of method:

pycnometer method

Type:

relative density

Density:

ca. 2.21

Temp.:

22.3 °C

Remarks on result:

other: T = 22.3 ± 0.5 °C.

The density of the substance was determined with two samples (triplicate readings). However, because the reproducibility was not acceptable (not within ± 20 kg/m^3), the determination was repeated with two new samples (triplicate readings). The reproducibility between the pressure readings of three of the samples were acceptable (within ± 20 kg/m^3)

and therefore the density was calculated as the mean value of the 3 samples' triplicate readings.

Determination	Test	P1(sample) (psig)	P2(sample) (psig)	Volume (cm^3)	Density(kg/m^3)	Mean Density (kg/m^3)	T (°C)
1*	A	17.308	6.974	14.542	2.212x10^3	1.926x10^3	22.6
	B	17.431	7.124	17.719	1.815x10^3
	C	17.441	7.149	18.369	1.751x10^3
2	A	17.737	7.193	15.988	2.208x10^3	2.196x10^3	22.6
	B	17.301	7.020	16.109	2.191x10^3
	C	17.313	7.025	16.113	2.190x10^3
3	A	17.279	6.945	13.978	2.275x10^3	2.221x10^3	22.0
	B	17.120	6.896	14.467	2.198x10^3
	C	17.195	6.928	14.525	2.189x10^3
4	A	17.102	6.999	18.018	2.237x10^3	2.199 x10^3	22.0
	B	17.171	7.042	18.483	2.181x10^3
	C	17.126	7.024	18.498	2.179x10^3

* Neglected reading

P1(sample), P2(sample) = Pressure readings with the sample cell containing test item (psig)

Mean density (Determinations 2, 3 & 4) : 2.206x103 kg/m^3

Relative density : 2.206

Mean Temperature : 22.3 ± 0.5 °C

Conclusions:

Even though the test temperature deviated from the one determined in Method A3 (440/2008/EC), the effect on the final results can be neglected (see overall remarks). With the exception of the test temperature, the method was followed and the density of the test item was determined to be 2.21 x 10^3 kg/m^3 at 22.3 ± 0.5 °C and have a relative density of 2.21.

Executive summary:

The density of the test substance was determined to be 2.21 x 10^3 kg/m^3 at 22.3 ± 0.5 °C (relative density of 2.21), using a gas comparison pycnometer, designed to be compatible with Method A3 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.

Description of key information

Gas comparison pycnometer: relative density 2.21 (OECD 109, EU Method A3 with slight deviations, GLP)

Key value for chemical safety assessment

Relative density at 20C:

2.21

Additional information

Even though the test temperature deviated from the one determined in Method A3 (440/2008/EC), the effect on the final results can be neglected in the case of a solid substance. With the exception of the test temperature, the method was followed and the density of the test item was determined to be 2.21 x 10^3 kg/m^3 at 22.3 ± 0.5 °C and to have a relative density of 2.21.