Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November 5, 2014 - May 21, 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-compliant study in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
(2009)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
(2006)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
(1996)
Deviations:
no
GLP compliance:
yes
Type of method:
other: Effusion method: isothermal thermogravimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Strontium Tartrate (anhydrous)
- Appearance: Off-white powder

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
< 1.3 other: E-08 Pa
Temp.:
25 °C
Vapour pressure:
< 2.9 other: E-08 Pa

Any other information on results incl. tables

Results of the isothermal TGA analysis:

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm2/h]

logνT

logPT

PT
[Pa]

 

 

 

 

 

 

210

1.640

1.96 x 10-4

-3.71

0.31

2.0

 

1.215

1.45 x 10-4

-3.84

0.16

1.4

 

 

 

 

 

 

220

2.740

3.27 x 10 -4

-3.49

0.57

3.7

 

1.699

2.03 x 10 -4

-3.69

0.33

2.1

 

 

 

 

 

 

230

3.886

4.64 x 10 -4

-3.33

0.75

5.6

 

2.933

3.50 x 10 -4

-3.46

0.61

4.0

 

 

 

 

 

 

240

6.944

8.29 x 10 -4

-3.08

1.04

11

 

4.040

4.82 x 10-4

-3.32

0.77

5.9

 

 

 

 

 

 

The coefficient of correlation (r) of the log p versus 1/T curve for the test substance in the range of 210°C and 240°C was < 0.99. It indicated that the weight loss was obtained due to reaction and/or decomposition of the test substance, which was also observed by discoloration of the test substance from white to brown/yellow.

The test substance weight losses at 210°C, 220°C, 230°C and 240°C were lower than the weight losses of benzo(ghi)perylene at the same temperatures. From this it was concluded that the vapour pressure of the substance is lower than the vapour pressure of benzo(ghi)perylene.

Applicant's summary and conclusion

Conclusions:
In a GLP-compliant study in accordance with EC A.4, OECD 104 and EPA OPPTS 830.7950 using the isothermal thermogravimetric effusion method, the vapour pressure of the substance at 25°C has been determined as < 2.9E-08 Pa (< 1.3E-08 Pa at 20°C).