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Density

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Reference
Endpoint:
density
Remarks:
density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16/05/2017 - 16/05/2017
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:
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): 2-phenylethyl benzoate
- Molecular formula: C15H14O2
- Molecular weight: 226.274 g/mol
- Substance type: organic
- Physical state: Liquid
- Smiles notation: c1(C(OCCc2ccccc2)=O)ccccc1
- InChl: 1S/C15H14O2/c16-15(14-9-5-2-6-10-14)17-12-11-13-7-3-1-4-8-13/h1-10H,11-12H2
Key result
Type:
density
Density:
1.106 g/cm³
Temp.:
20 °C

Method details

 

Observed values

 

1stObservation

2ndObservation

Guideline

OECD 109

 

 

Method

IS 4730 : 1994 (Reaffirmed 2010) –Method for Determination of Density

of Liquids (First Revision)

 

 

Principle of

Method

Determination of the mass at a given temperature of a volume of the material contained in a density bottle (pyknometer) and determination of the volume of the latter by

determining the mass of the

corresponding volume of water at the same temperature. The density is obtained by dividing the mass of material by its volume.

 

 

Test

temperature

(°C)

20°C

20°C

Atmospheric

pressure

(hPa)

965.9

964.8

Weight of

empty dry

pyknometer(X)

g

29.354

30.709

Weight of

pyknometer +

test item (Y)

g

83.974

85.761

Apparent

mass of test

item (M1)

(M1 = Y - X) g

54.62

55.052

Weight of

pyknometer +

water (Z)

g

78.185

80.879

Apparent

mass of water

(M2)

(M2 = Z - X) g

48.831

50.17

Buoyancy

correction (A)

A = (*ρat × M2)

0.0570

0.0570

Density of

water** at test

temperature

g/cm³ (ρtw)

0.9982

0.9982

*ρat=density of air at 27°C and 760 mm Hg pressure= 0.001168 g/cm³

**Density of water referred from the Table 1 of the IS method.

 

CALCULATIONS:

Density = (M1+A/ (M2+A) ) X ρtw

1st calculated density

 

2nd calculated density

54.677/48.888*0.9982=1.1164 g/cm3

55.1105/50.2285*0.9982=1.0952 g/cm3

Average density

1.1058 g/cm3

 

Conclusions:
The density of test chemical was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of test item was determined to be 1.1058 g/cm³at 20°C and 965.3 hPa.
Executive summary:

The density of test chemical was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of test item was determined to be 1.1058 g/cm³ at 20°C and 965.3 hPa.

Description of key information

The density of test chemical was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of test item was determined to be 1.1058 g/cm³ at 20°C and 965.3 hPa.

Key value for chemical safety assessment

Relative density at 20C:
1.106

Additional information

The density of test chemical was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of test item was determined to be 1.1058 g/cm³ at 20°C and 965.3 hPa.

Other supporting study from reliable handbook also indicates that the density of test chemical to be in the range of 1.092 g/cm3 to 1.096 g/cm3 at 25 degree C.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of density as 1.1058 g/cm3 at 20 degree C thus considered as key study for the chemical safety assessment.