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Registration Dossier
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EC number: 278-270-6 | CAS number: 75627-12-2
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 01 March 2017 - 05 may 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- Xanthylium, 3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-, molybdatesilicate
- EC Number:
- 278-270-6
- EC Name:
- Xanthylium, 3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-, molybdatesilicate
- Cas Number:
- 75627-12-2
- Molecular formula:
- C54H58N4O6.MoO4 + C54H58N4O6.SiO3
- IUPAC Name:
- 3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-10λ⁴-xanthen-10-ylium dioxomolybdenumbis(olate) silicate
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Appearance: Pink powder
- Storage conditions: At room temperature
1
- Specific details on test material used for the study:
- Decomposition temp.: 175°C
Results and discussion
Vapour pressureopen allclose all
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- < 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- < 0 Pa
Any other information on results incl. tables
Experimental details are included in the study report (attached in section 4.2).
The log PT versus 1/T curve for the substance over the range 160-190°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures. Since the weight loss of the test item at 160-190°C was lower than the weight loss of reference substance chrysene at the same temperatures, it was considered that vapour pressure of the substance at 20°C (25°C) is lower than the vapour pressure of chrysene at 20°C (25°C).
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the substance at 20°C was determined to be <8.4E-7 Pa.
The vapour pressure of the substance at 25°C was determined to be <2.2E-6 Pa. - Executive summary:
The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950.
The constants specific for the experimental arrangement were determined using a set of 5 reference compounds. The log PT versus 1/T curve for the substance over the range 160-190°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures.
From the measured weight losses in the temperature range 160 -190°C, the vapour pressure of the substance was determined to be lower than the vapour pressure of reference substance chrysene. The vapour pressure of the substance at 20°C and 25°C was concluded to be < 8.4E-7 Pa and < 2.2E-6 Pa, resp.
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