3,5-diaminobenzoic acid

Density

Link to relevant study record(s)

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

Qualifier:

according to guideline

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

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	1^stReading	2^nd 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)	-	20^oC	20^oC
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
	1^stCalculation	2^nd 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.