Triiron bis(orthophosphate)

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05 Nov 2015 - 05 Jan 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Principles of method if other than guideline:

- Name of test material (as cited in study report): Triiron bis(orthophosphate)
- Physical state: solid powder
- Analytical purity: assay approx. 99.0% (based on approx. 46.4 % Fe and approx. 40 % P2O5)
- Purity test date: September 2015
- Lot/batch No.: NBD-15-004-08-2
- Expiration date of the lot/batch: 2018
- Storage condition of test material: room temperature, in the dark

GLP compliance:

yes (incl. QA statement)

Type of method:

air comparison pycnometer (for solids)

Type:

relative density

Density:

3.951 g/cm³

Temp.:

20 °C

The relative density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0) was determined using the gas comparison method at a temperature of 20 °C. The determination of the relative density was performed four times (two main tests); by three fold measurements of four independent test item samples. The individual readings are summarised in Table 1 and 2.

The density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0) was determined to be 3.951 g/cm³ (= 3951 kg/m³) at 20 °C (mean value of the two main tests, n = 4).

Table 1. Determination of the Density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0)

Main test I

measurement	temperature	sample cell (empty)	sample cell (filled)	amount of test item	pressure p1	pressure p2	sample volume	density
	[°C]	[g]	[g]	[g]	[psi]	[psi]	[cm^3]	[g/cm^3]
1	20,7	4,1461	11,2995	7,1534	16,106	4,882	1,811	3,949
2	20,7			7,1534	16,106	4,880	1,796	3,984
3	20,7			7,1534	16,678	5,055	1,808	3,956
						mean:		3,963
						SD:		1,852%
4	20,7	4,1465	11,2208	7,0743	15,897	4,816	1,790	3,952
5	20,7			7,0743	16,396	4,966	1,781	3,972
6	20,7			7,0743	16,897	5,120	1,798	3,935
						mean:		3,953
						SD:		1,852%
						mean:		3,958
						SD:		0,007

Table 2. Determination of the Density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0)

Main test II

measurement	temperature	sample cell (empty)	sample cell (filled)	amount of test item	pressure p1	pressure p2	sample volume	density
	[°C]	[g]	[g]	[g]	[psi]	[psi]	[cm^3]	[g/cm^3]
1	20,7	4,1478	12,3049	8,1571	16,421	5,010	2,062	3,957
2	20,6			8,1571	16,163	4,932	2,067	3,946
3	20,6			8,1571	16,217	4,948	2,063	3,953
						mean:		3,952
						SD:		0,557%
4	20,6	4,1473	12,0442	7,8969	16,353	4,982	2,006	3,937
5	20,6			7,8969	16,265	4,955	2,004	3,940
6	20,7			7,8969	16,240	4,948	2,009	3,931
						mean:		3,936
						SD:		0,458%
						mean:		3,944
						SD:		0,011

Conclusions:

In conclusion, the relative density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0) was determined to be 3.951.

Description of key information

Relative density: 3.951 g/cm³ at 20 °C (OECD 109, GLP)

Key value for chemical safety assessment

Relative density at 20C:

3.951

Additional information

The relative density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0) was determined in accordance with OECD Guideline 109 and GLP using the gas comparison method at a temperature of 20 °C (Wagner-Rivas, 2016). The determination of the relative density was performed by three fold measurements of four independent test item samples. The density of Triiron bis(orthophosphate) (CAS 14940-41-1, EC 239-018-0) was determined to be 3.951 g/cm³ (= 3951 kg/m³) at 20 °C.