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Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
Testing was conducted on 18 March 2010.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
This study is conducted according to an appropriate method and under the conditions of GLP and therefore the study is considered to be acceptable and to adequately satisfy the regulatory requirement as a key study for this endpoint. The rationale for reliability has not been amended despite the use as read across data. This approach is justified on the basis that although the test material is a hydrated form of the substance to be registered, the relevant study observations / measurements have been made with a view to determining the properties on the anhydrous magnesium hydrogenorthophosphate.
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
(Date of GLP inspection: 2009-09-15 Date of Signature on GLP certificate: 2009-11-26)
Type of method:
air comparison pycnometer (for solids)
Type:
relative density
Density:
2.17
Temp.:
21.5 °C

Results

Calibration

The pressure readings (P1and P2) and the calculated volume for the calibration ball are shown in the following table:

Determination

P1

P2

Volume (cm3)

Certified Volume (cm3)

Tolerance

(cm3)

A

17.457

6.827

1.052

1.073

± 0.05

B

17.210

6.734

1.062

1.073

± 0.05

C

17.250

6.749

1.061

1.073

± 0.05

D

17.258

6.753

1.063

1.073

± 0.05

Sample

The pressure readings, calculated volumes and density values obtained for the test item are shown in the following table:

Determination

P1

P2

Volume (cm3)

Density

(kg/m3)

A

17.360

6.612

0.542

2173.5

B

17.135

6.526

0.541

2168.1

Temperature:            21.5 ± 0.5ºC
Mean density:                       2170.8 kg/m3
Relative density:                   2.17

Conclusions:
The relative density of the test item has been determined to be 2.17 at 21.5 ± 0.5°C.
Executive summary:

.

Description of key information

Relative density: 2.17 at 21.5°C (EU Method A.3, GLP)

Key value for chemical safety assessment

Additional information

The relative density of the test item has been determined to be 2.17 at 21.5 ± 0.5°C.