Ethylidynetrimethanol

Density

Administrative data

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental phase started 16th June 2016 and completed on the 15th January 2017.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

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

Test material

Test material information

Constituent 1

Reference substance name:

Ethylidynetrimethanol

EC Number:

201-063-9

EC Name:

Ethylidynetrimethanol

Cas Number:

77-85-0

Molecular formula:

C5H12O3

IUPAC Name:

2-(hydroxymethyl)-2-methylpropane-1,3-diol

Test material form:

solid: granular

Results and discussion

Density

Key result

Type:

relative density

Density:

ca. 1 220 kg/m³

Temp.:

20.3 °C

Any other information on results incl. tables

Results

Calibration

The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:

Table 6

Determination	P1 (psig)	P2 (psig)	P3 (psig)	P4 (psig)	Reference cell volume (cm^3)	Sample cell volume (cm^3)
1	17.313	6.557	17.367	8.610	90.740	148.848
2	17.049	6.459	16.951	8.403	90.885	149.012
3	17.150	6.501	17.278	8.564	91.145	149.300

Mean reference cell volume :          90.953 cm³
Mean sample cell volume     :          149.225 cm³

As the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm³and 149.225 ± 1.0 cm³for the reference and sample cell volumes respectively) the gas comparison pycnometer was therefore considered acceptable for u

 Sample

The pressure readings, calculated volumes and density values obtained for the test item are shown in the following table:

Table 7

Determination	Test	P1(sample) (psig)	P2(sample) (psig)	Volume (cm^3)	Density (kg/m^3)	Mean density (kg/m^3)
1	A	17.120	7.615	35.564	1.222 x 10^3	1.22 x 10^3
	B	17.050	7.581	35.487	1.225 x 10^3
	C	17.073	7.589	35.427	1.227 x 10^3
2	A	17.113	7.557	34.079	1.221 x 10^3	1.22 x 10^3
	B	17.112	7.555	34.037	1.222 x 10^3
	C	17.049	7.523	33.922	1.226 x 10^3

Mean density             :          1.22 x 10³ kg/m³
Relative density         :          1.22
Temperature              :          20.3 ± 0.5 °C

 Discussion

Duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m³was obtained.

Applicant's summary and conclusion

Conclusions:

The density of the test item has been determined to be 1.22 x 103 kg/m3 at 20.3 ± 0.5 °C (relative density: 1.22).