Dicalcium pyrophosphate

Density

Link to relevant study record(s)

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

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

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]	[cm^3]	[g/cm^3]
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.