p,p',p''-tris(dimethylamino)trityl alcohol

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental test results performed usings standard guidelines

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

GLP compliance:

no

Type of method:

pycnometer method

Key result

Type:

density

Density:

0.633 g/cm³

Temp.:

20 °C

OBSERVATIONS

For water insoluble solids, the specific gravity of test chemical was recorded in replicates with respect to

specific gravity of water at respective test temperature and atmospheric pressure. The density was thus

calculated by multiplying mean of specific gravity and average density is reported.

By Pyknometer Method (for water insoluble solids)

Method Details	Observation
Test temperature (°C)	20°C	20°C
Density of water at test temperature g/cm³ (ρtw)	0.9982	0.9982
Atmospheric pressure (in hPa)	964.2	964.3
Weight of empty dry pyknometer (Wp)	29.465	29.193
Weight of pyknometer filled with water (WA)	78.950	78.856
Weight of pyknometer + test Item (WPS)	40.853	41.734
Weight of pyknometer +test Item+ water (WB)	71.788	72.242

CALCULATION

For water insoluble solids:

specific gravity - Wo

Wo + (Wa - Wb)

Where,

W0 = weight of test chemical in g = WPS - WP

WPS = weight of pycnometer + test chemical

WP = weight of empty pycnometer

WA = weight of pycnometer filled with water

WB = weight of pycnometer filled with water and test chemical

For reporting the density of test chemical multiply the specific gravity of that test chemical with the density of

water at that degree Celsius.

Density (g/cm3) = GS * ρtw

Where,

GS = Calculated specific gravity of that test chemical

ρtw = density of water at test temperature i.e. 20 °C

	Calculated values
	1st Calculation	2nd Calculation
Wo=WPS-WP	11.3880	12.5410
(WA-WB)	7.1620	6.6140
Specific Gravity = WO/[WO + (WA-WB)]	0.6139	0.6547
Specific Gravity Gs	0.6139	0.6547
Density (g/cm³)	0.6127	0.6535
Mean Density (g/cm³)	0.6331

Conclusions:

The mean density of test chemical was determined to be 0.6331gm/cm3 at 20°C and 964.25 hPa.

Executive summary:

A study was performed to determine the density of test chemical in respective atmospheric pressure and temperature conditions. The study was conducted in accordance with OECD guideline for the Testing of Chemicals no. 109; ASTM 854-02: Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer The mean density of test chemical was determined to be 0.6331gm/cm3 at 20°C and 964.25 hPa.

Description of key information

The mean density of test chemical was determined to be 0.6331gm/cm3 at 20°C and 964.25 hPa.

Key value for chemical safety assessment

Relative density at 20C:

0.633

Additional information

A study was performed to determine the density of test chemical in respective atmospheric pressure and temperature conditions. The study was conducted in accordance with OECD guideline for the Testing of Chemicals no. 109; ASTM 854-02: Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer The mean density of test chemical was determined to be 0.6331gm/cm3 at 20°C and 964.25 hPa.