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Physical & Chemical properties

Density

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Reference
Endpoint:
density
Remarks:
density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-02-04 – 2017-02-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental result performed using standard methods of analysis
Reference:
Composition 1
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Principles of method if other than guideline:
The density is calculated from the difference in weight between the full and empty pycnometer and its volume
GLP compliance:
no
Type of method:
pycnometer method
Test material information:
Composition 1
Specific details on test material used for the study:
- Name of test material (as cited in study report): 3,5-Diaminobenzoic acid
- Molecular formula : C7H8N2O2
- Molecular weight : 152.1522 g/mol
- Substance type:Organic
- Physical state:Solid
Key result
Type:
density
Density:
1.401 g/cm³
Temp.:
20 °C

Method Details

Observations

Remarks if, any

Guideline

OECD 109

1stReading

2nd Reading

 

 

 

Method

Adapted from ASTM 854-02

 

 

 

Principle of method

The density of test item is determined by using pyknometer. It is the ratio of mass of the unit volume of test item at a stated temperature to mass of the same volume of gas free distilled water at a stated temperature.

 

 

 

Test temperature (°C)

-

20oC

20oC

 

Atmospheric pressure (in hPa)

-

979.6

979.7

 

Weight of empty dry pyknometer (Wp)

 

30.880

29.365

 

Weight of pyknometer filled with water (WA)

 

81.057

79.098

 

Weight of pyknometer + test Item (WPS)

 

34.870

33.024

 

Weight of pyknometer +test Item+ water (WB)

 

82.181

80.173

 

 

 

CALCULATIONS:

 

Calculated values

1st Calculation

2nd Calculation

 

Wo=WPS-WP

 

3.990

 

3.659

 

(WA-WB)

 

-2.866

 

-2.584

 

Specific gravity = WO/[WO+ (WA-WB)]

3.990/[3.990-2.866]

3.659/[3.659-2.584]

 

Specific Gravity; Gs

1.392 *0.9982

1.416 *0.9982

Density (g/cm³)

1.389

1.413

Mean Density (g/cm³)

   1.401

Conclusions:
The density of substance 3,5-diaminobenzoic acid (CAS No. 535-87-5)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer.The mean density of 3,5-diaminobenzoic acid is was determined to be 1.401 g/cm³at 20°C and 979.6 hPa.
Executive summary:

The density of substance 3,5-diaminobenzoic acid (CAS No. 535-87-5)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer.The mean density of 3,5-diaminobenzoic acid is was determined to be 1.401 g/cm³at 20°C and 979.6 hPa.

Description of key information

The density of substance 3,5-diaminobenzoic acid (CAS No. 535-87-5)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer.The mean density of 3,5-diaminobenzoic acid is was determined to be 1.401 g/cm³at 20°C and 979.6 hPa.

Key value for chemical safety assessment

Relative density at 20C:
1.401

Additional information

The density of substance 3,5-diaminobenzoic acid (CAS No. 535-87-5)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer.The mean density of 3,5-diaminobenzoic acid is was determined to be 1.401 g/cm³at 20°C and 979.6 hPa.

Other supporting study from authoritative database also suggests that the density of chemical 3,5-Diaminobenzoic acid was determined to be1.428±0.06 g/cm3at20 °C and pressue 760 Torr.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of density as 1.401 g/cm3 at 20 degree C.,thus considered as key study for the chemical safety assessment.