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Physical & Chemical properties

Density

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Administrative data

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19.12.2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
no
Type of method:
pycnometer method
Specific details on test material used for the study:
During inquiry (inquiry number: 06-2120767575-41-0000 ) the name was changed from „Reaction mass of metaphosphoric acid and trisodium trimetaphosphate (Reaction mass of metaphosphoric acid and sodium metaphosphate)” to “Amorphous condensation products of orthophosphoric acid and sodium carbonate (3-6 : 1)“.
Key result
Type:
relative density
Density:
ca. 2.34 other: g/mL
Temp.:
20.1 °C

The density of metaphosphoric acid was determined with the help of the following equation (1):

                               

ρS= ((m2-m0) x ρT) / ((m1-m0) – (m3-m2))        (1)

There is:

 – mass of pycnometer

 – mass of pycnometer + toluene

 – mass of pycnometer + sample

 – mass of pycnometer + toluene + sample

 – relative density of toluene on 20.3 °C

 – relative density of sample (solid)

 

Sample No.

Mass (pycnometer + sample), [g] ()

Mass (pycnometer +

toluene + sample), [g] ()

Density, [g/mL]

1

62.7145

74.8075

2.32

2

62.6522

74.9210

2.36

3

59.8490

73.0052

2.32

4

59.4813

72.9300

2.36

5

57.6472

71.7362

2.35

 

 

Average

2.34

 

 

SD

0.02

 

Tab. 1       Relative density data of metaphosphoric acid.

Conclusions:
Relative density of amorphous condensation products of orthophosphoric acid and sodium carbonate (3-6 : 1) determined according to OECD TG 109 was 2.34 g/mL.

Description of key information

Key value for chemical safety assessment

Relative density at 20C:
2.34

Additional information