1,3-bis(hydroxymethyl)urea

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2011-03-24 to 2001-11-02

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

1.478 other: dimensionless

Temp.:

20 °C

All measurements were carried out at 20 °C.

Table 1: Density determination of the test item

		1^stdetermination	2^nddetermination
A	Mass ofpycnometerempty (corrected for air)	37.0116 g	34.8728 g
B	Mass ofpycnometerwith test item (corrected for air)	40.8645 g	40.1637 g
C	Mass ofpycnometerwith test item and displacement liquid	58.6746 g	57.0833 g
D	Mass of displacement liquid calculated for the totalpycnometervolume	19.8814 g	19.7817 g
E	Mass of test item (B - A)	3.8530 g	5.2908 g
F	Mass of displacement liquid (C - B)	17.8101 g	16.9196 g
G	Mass of displacement liquid calculated for the volume taken by the test item (D – F)	2.0713 g	2.8621 g
H	Volume ofpycnometer	24.939 cm^3	24.814 cm^3
I	Density of the test item (E/G * density of displacement liquid)	1.4829 g/cm^3	1.4737 g/cm^3
J	Relative density (I/density of water at 4 °C)                                                       (mean)	1.478

 

The relative density was calculated by division of the density of the test item at 20 °C and the density of water at 4 °C. The test item is solid at room temperature.

Conclusions:

The relative density was calculated by division of the density of the test item at 20 °C and the density of water at 4 °C. It was calculated to be: D4^20 = 1.478 ± 0.01.

Executive summary:

A study was conducted according to OECD TG 109, Regulation (EC) No 440/2008 method A.3 and OPPTS 830.7300 to determine the relative density of the test item. The density was determined in two independent determinations. Using the pycnometer method the density was determined to be 1.478 ± 0.01 g/cm³ at 20 ± 0.5 °C and the relative density 1.478 with respect to water at 4 °C, respectively. The standard deviation reflects the distinguished correlation of the individual determinations. No observations were made which cause doubt on the validity of the outcome of the study.

Description of key information

The relative density was calculated by division of the density of the test item at 20 °C and the density of water at 4 °C. It was calculated to be: D4²⁰ = 1.478 ± 0.01.

Key value for chemical safety assessment

Relative density at 20C:

1.478

Additional information

A study was conducted according to OECD TG 109, Regulation (EC) No 440/2008 method A.3 and OPPTS 830.7300 to determine the relative density of the test item (reference 4.4-1). The density was determined in two independent determinations. Using the pycnometer method the density was determined to be 1.478 ± 0.01 g/cm³at 20 ± 0.5 °C and the relative density 1.478 with respect to water at 4 °C respectively. The standard deviation reflects the distinguished correlation of the individual determinations. No observations were made which cause doubt on the validity of the outcome of the study.