Dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride

Density

Link to relevant study record(s)

Reference

Endpoint:

density

Remarks:

density

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

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

Key result

Type:

density

Density:

0.914 g/cm³

Temp.:

20.2 °C

Remarks on result:

other: no other details available

FOR LIQUIDS:

By Pyknometer Method:

Method Details		Observed Values
		1st Observation	2nd Observation
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)	20.5°C	20.0°C
Atmospheric pressure	(hPa)	970.4	972.6
Weight of empty dry pyknometer(X)	g	29.323	31.239
Weight of pyknometer + test item (Y)	g	74.775	75.741
Apparent mass of test item (M1)	(M1 = Y - X) g	45.452	45.502
Weight of pyknometer + water (Z)	g	78.942	80.889
Apparent mass of water (M2)	(M2 = Z - X) g	49.619	49.650
Buoyancy correction (A)	A = (*ρat × M2)	0.057	0.057
Density of water** at test temperature	g/cm³ (ρtw)	0.9980	0.9982

 

CALCULATIONS:

FOR LIQUIDS

Density = (M1+A)/ (M2+A) X ρtw

1st calculated density	2nd calculated density
(45.452+0.057) ____________ X 0.9980 = 1.093 g/cm3 g/cm³ (49.619+0.057)	(45.502+0.057) ____________ X 0.9982 = 0.9148 g/cm3 g/cm³ (49.650+0.057)
Average density	= 0.9145 g/cm³

Conclusions:

The density of test chemical was determined following OECD Guideline 109 and according to the according to the Indian standard method for determination of density of liquids [IS 4730:1994 (Reaffirmed 2010)] using glass pyknometer. The mean density of the test item was found to be 0.9145 g/cm³ at 20.2°C and 971.5 hPa..

Executive summary:

The density of test chemical was determined following OECD Guideline 109 and according to the according to the Indian standard method for determination of density of liquids [IS 4730:1994 (Reaffirmed 2010)] using glass pyknometer. The mean density of the test item was found to be 0.9145 g/cm³ at 20.2°C and 971.5 hPa..

Description of key information

The density of test item Dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (CAS No. 27668-52-6)was determined following OECD Guideline 109 and according to the according to the Indian standard method for determination of density of liquids [IS 4730:1994 (Reaffirmed 2010)] using glass pyknometer. The mean density of the test item was found to be 0.9145 g/cm³ at 20.2°C and 971.5 hPa.

Key value for chemical safety assessment

Relative density at 20C:

0.914

Additional information

The density of test chemical was determined following OECD Guideline 109 and according to the according to the Indian standard method for determination of density of liquids [IS 4730:1994 (Reaffirmed 2010)] using glass pyknometer. The mean density of the test item was found to be 0.9145 g/cm³ at 20.2°C and 971.5 hPa..

Other supporting study from reliable source suggests that the density of chemical was reported to be 0.89 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 0.9145 g/cm3 at 20.2 degree C thus considered as key study for the chemical safety assessment.