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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30 September 2009- 6 January 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed according to OECD and EC guidelines and according to GLP principles.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: by loss of weight or by trapping vaporisate

Test material

Constituent 1
Chemical structure
Reference substance name:
Tris(methylphenyl) phosphite
EC Number:
247-119-6
EC Name:
Tris(methylphenyl) phosphite
Cas Number:
25586-42-9
Molecular formula:
C21H21O3P
IUPAC Name:
tris(methylphenyl) phosphite
Details on test material:
- Name of test material (as cited in study report): TTP
- Molecular formula: C21H21PO3
- Molecular weight: 352
- Substance type: Clear colourless liquid
- Physical state: liquid
- Analytical purity:>92,1%
- Impurities: - 7,5% Phosphorochloridous acid, bis-methylphenyl)ester
- 0,4% Cresol
(the initial purity information in the study report (which was 99%) has been corrected with an amendement of the report on 9. Nov 2011)
- Isomers composition: -
- Purity test date: -
- Lot/batch No: HR9C77938
- Expiration date of the lot/batch: 31 March 2010
- Stability under test conditions: Stable
- Storage condition of test material: At room temperature in the dark under nitrogen
- Other: Test substance handling: Reactive to moisture, handle in nitrogen environment in glove box

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
0.524 Pa
Remarks on result:
other: Extrapolation of the curve to 20°C resulted in a value of -4.49 for the log ¿T, 20 of the test substance. Fitting this value in the regression curve, a vapour pressure of 5.24x10-1 Pa = 3.93x10-3 mm Hg was obtained.

Applicant's summary and conclusion

Conclusions:
The isothermal thermogravimetric effusion method was chosen for the determination of the vapour pressure of TTP. The vapour pressure of the test substance at 20°C (293K) was 5.24 x 10-1 Pa = 3.93 x 10-3 mm Hg.