6-aminonaphthalene-2-sulphonic acid

Density

Link to relevant study record(s)

Reference

Endpoint:

bulk density

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20/8/2016 - 20/8/2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental test result performed using standard OECD test guideline.

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Principles of method if other than guideline:

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.

GLP compliance:

no

Type of method:

pycnometer method

Key result

Type:

density

Density:

1.553 g/cm³

Temp.:

20 °C

Remarks on result:

other: Pressure = 964.5 hPa

OBSERVATIONS :

Method Details		Observations		Remarks if, any
Guideline	OECD 109	1^stReading	2^nd Reading
Method	Adapted from ASTM D854-02
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	20
Density of water at test temperature; g/cm^3(ρtw)		0.9982	0.9982
Atmospheric pressure (in hPa)	-	964.4	964.6
Weight of empty dry pyknometer (Wp)		30.955	29.234
Weight of pyknometer filled with water (WA)		81.354	78.747
Weight of pyknometer + test Item (WPS)		35.980	34.274
Weight of pyknometer +test Item+ water (WB)		83.164	80.539

CALCULATIONS:

	Calculated values
	1^stCalculation	2^nd Calculation
Wo=WPS-WP	5.025	5.040
(WA-WB)	-1.810	-1.792
Specific Gravity = WO/[WO+ (WA-WB)]	5.025/[5.025-1.810]	5.040/[5.040-1.792]
Specific Gravity; Gs	1.562	1.551
Density (g/cm^3)	1.562 × 0.9982 =1.559	1.551 × 0.9982 =1.548
Mean Density (g/cm^3)	1.553 g/cm^3

Conclusions:

The mean density of the test chemical was determined to be 1.553 g/cm3 at 20° C and 964.5 hPa.

Executive summary:

The density of test chemical was determined following OECD guideline 109 and according to the method adapted from ASTMD 854-02. The mean density of the test chemical was determined to be 1.553 g/cm3 at 20° C and 964.5 hPa.

Description of key information

The density of test chemical was determined following OECD guideline 109 and according to the method adapted from ASTMD 854-02. The mean density of the test chemical was determined to be 1.553 g/cm3 at 20° C and 964.5 hPa.

Key value for chemical safety assessment

Relative density at 20C:

1.553

Additional information

The density of test chemical was determined following OECD guideline 109 and according to the method adapted from ASTMD 854-02. The mean density of the test chemical was determined to be 1.553 g/cm3 at 20° C and 964.5 hPa.

Other supporting studies from various reliable sources such as handbook also suggests that, the density of test chemical was observed to be 1.3556 g/cm3 at 25 °C.

As the data from lab has K1 reliability and the test was performed using OECD guideline which has the value of density as 1.553 g/cm3 at 20°C and 964.5 hPa, thus considered as key study for the chemical safety assessment.