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Density

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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

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)

-

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

1st Calculation

2nd 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.

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