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Density

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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]  [cm3] [g/cm3]
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]  [cm3] [g/cm3]
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.