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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26 Oct - 13 Nov 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-Guideline study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
air comparison pycnometer (for solids)
Type:
relative density
Density:
2.866 g/cm³
Temp.:
20 °C

The relative density of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5) was determined using the gas comparison method at a temperature of 20 °Cwith a maximum deviation of + 0.6 °C.

The determination of the relative density was performed by three-fold measurements of two independent test item samples. The individual readings are summarised in Table 1.

The density of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5) was determined to be 2.866 g/cm³ (= 2866 kg/m³) at 20 °C.

Table 1. Determination of theDensity of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5)

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 20,6 4,1160 18,3321 14,216 15,171 5,000 4,954 2,869
2 20,6     14,216 15,117 4,983 4,960 2,866
3 20,6     14,216 15,085 4,972 4,957 2,868
            mean:   2,868
            SD:   0,15%
4 20,6 4,1160 18,6335 14,518 15,111 4,997 5,073 2,862
5 20,6     14,518 15,153 5,010 5,067 2,865
6 20,6     14,518 15,103 4,994 5,071 2,863
            mean:   2,863
            SD:   0,15%
            mean:   2,866
            SD:   0,003
Conclusions:
In conclusion, the relative density of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5) was determined to be 2.866.

Description of key information

Relative density: 2.866 g/cm³ at 20 ± 0.6 °C (OECD 109, GLP)

Key value for chemical safety assessment

Relative density at 20C:
2.866

Additional information

The relative density of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5) was determined in accordance with OECD Guideline 109 and GLP using the gas comparison method at a temperature of 20 °C with a maximum deviation of + 0.6 °C (Wagner-Rivas, 2015). The determination of the relative density was performed by three-fold measurements of two independent test item samples.

The density of Dicalcium pyrophosphate (CAS 7790-76-3, EC 232-221-5) was determined to be 2.866 g/cm³ (= 2866 kg/m³) at 20 °C.