Diphenylacetic 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:

2017-02-09 – 2017-02-09

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):diphenyl acetic acid
- Molecular formula :C14H12O2
- Molecular weight: 212.247 g/mol
- Substance type:Organic
- Physical state:Solid

Key result

Type:

density

Density:

1.119 g/cm³

Temp.:

20 °C

Remarks on result:

other: pressure=977.5 hPa.

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)	-	977.8	977.2
Weight of empty dry pyknometer (Wp)		30.937	29.107
Weight of pyknometer filled with water (WA)		80.999	78.548
Weight of pyknometer + test Item (WPS)		35.824	34.104
Weight of pyknometer +test Item+ water (WB)		81.524	79.386

 

 

CALCULATIONS:

	Calculated values
	1^stCalculation	2^nd Calculation
Wo=WPS-WP	4.887	4.997
(WA-WB)	-0.525	-0.838
Specific gravity = WO/[WO+ (WA-WB)]	4.887/[4.887-0.525]	4.997/[4.997-0.838]
Specific Gravity; Gs	1.203 *0.9982	1.201*0.9982
Density (g/cm³)	1.200	1.198
Mean Density (g/cm³)	1.199

Conclusions:

The density of substance diphenyl acetic acid (CAS No. 117-34-0)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer. The mean density of substance diphenyl acetic acid is was determined to be 1.199 g/cm³at 20 °C and 977.5 hPa.

Executive summary:

The density of substance diphenyl acetic acid (CAS No. 117-34-0)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer. The mean density of substance diphenyl acetic acid  is was determined to be 1.199 g/cm³at 20 °C and 977.5 hPa.

Description of key information

The density of substance diphenyl acetic acid (CAS No. 117-34-0)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer. The mean density of substance diphenyl acetic acid  is was determined to be 1.199 g/cm³at 20 °C and 977.5 hPa.

Key value for chemical safety assessment

Relative density at 20C:

1.199

Additional information

The density of substance diphenyl acetic acid (CAS No. 117-34-0)was determined following OECD Guideline 109 and according to the Adapted from ASTM D854-02 using glass pyknometer. The mean density of substance diphenyl acetic acid  is was determined to be 1.199 g/cm³at 20 °C and 977.5 hPa.

Other supporting studies from various reliable sources such as handbook and prediction databases,the density of chemical was determined to be 1.257 g/cm3 at 15 degree C  (experimental data)  and 1.174 ± 0.06 g/cm3 at 20 degree C(predicted data).

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of density as 1.199 g/cm3 at 20 degree C, thus considered as key study for the chemical safety assessment.