1-phenylazo-2-naphthol

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-01-09 – 2017-01-09

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experiemntal 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 of 1-phenylazo-2-naphthol (CAS No. 842-07-9) was determined following OECD guideline 109 and according to the method adapted from ASTM D 854-02.

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): C.I Solvent Yellow 14
Molecular formula :C16H12N2O
Molecular weight :248.284
Smiles notation :
c12c(\N=N\c3ccccc3)c(ccc1cccc2)O
InChl :
1S/C16H12N2O/c1915111012645914(
12)16(15)1817137213813/
h111,19H/b1817+
Physical State: Solid
Substance type: Organic

Key result

Type:

density

Density:

0.319 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)	-	978.5	977.2
Weight of empty dry pyknometer (Wp)		30.728	29.221
Weight of pyknometer filled with water (WA)		81.017	78.929
Weight of pyknometer + test Item (WPS)		35.779	34.211
Weight of pyknometer +test Item+ water (WB)		69.817	68.768

 

 

CALCULATIONS:

	Calculated values
	1^stCalculation	2^nd Calculation
Wo=WPS-WP	5.051	4.990
(WA-WB)	11.200	10.161
Density = WO/[WO+ (WA-WB)]	5.051/(5.051+11.200))	4.990/(4.990+10.161)
Specific Gravity; Gs	0.3108 *0.9982	0.3293*0.9982
Density (g/cm³)	0.3102	0.3287

Conclusions:

The density of chemical 1-phenylazo-2-naphthol (CAS No. 842-07-9)was determined following OECD Guideline 109 and according to the method Adapted from ASTM D854-02using glass pyknometer. The mean density of test item is was determined to be 0.3194g/cm³ at 20°C and 977.8 hPa.

Executive summary:

The density of chemical 1-phenylazo-2-naphthol (CAS No. 842-07-9)was determined following OECD Guideline 109 and according to the method Adapted from ASTM D854-02using glass pyknometer. The mean density of test item is was found to be 0.3194g/cm³ at 20°C and 977.8 hPa.

Description of key information

The density of chemical 1-phenylazo-2-naphthol (CAS No. 842-07-9) was determined following OECD Guideline 109 and according to the method Adapted from ASTM D854-02using glass pyknometer. The mean density of test item is was found to be 0.3194g/cm³ at 20°C and 977.8 hPa.

Key value for chemical safety assessment

Relative density at 20C:

0.319

Additional information

The density of chemical 1-phenylazo-2-naphthol (CAS No. 842-07-9)was determined following OECD Guideline 109 and according to the method Adapted from ASTM D854-02using glass pyknometer. The mean density of test item is was found to be 0.3194g/cm³ at 20°C and 977.8 hPa.

Other supporting study from various authoritative databases suggests that the density of chemical 1-phenylazo-2-naphthol was reported to be 0.18 g/cm3.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of density as 0.3149 g/cm3 thus considered as key study for the chemical safety assessment.