Registration Dossier
Registration Dossier
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EC number: 269-503-2 | CAS number: 68259-00-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 07Jan2019 to 05Jun2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- GLP compliance:
- yes
- Type of method:
- effusion method: isothermal thermogravimetry
Test material
- Reference substance name:
- Methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- EC Number:
- 269-503-2
- EC Name:
- Methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- Cas Number:
- 68259-00-7
- Molecular formula:
- C14H16N3.CH3O4S
- IUPAC Name:
- methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- Test material form:
- solid: particulate/powder
- Details on test material:
- Batch 1065826
Constituent 1
- Specific details on test material used for the study:
- Batch (Lot) Number: 1065826
Expiry date: 13 November 2021 (expiry date)
Physical Description: Yellow powder
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #1
- Temp.:
- ca. 20 °C
- Vapour pressure:
- < 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- ca. 25 °C
- Vapour pressure:
- < 0 Pa
Any other information on results incl. tables
The isothermal TGA effusion method was applied for the determination of the vapour pressure of Methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
< 1.3 E-8 Pa
< 1.0 E-10 mm Hg
25°C
< 5.5 E-8 Pa
< 4.1 E-10 mm Hg
Applicant's summary and conclusion
- Conclusions:
- The isothermal TGA effusion method was applied for the determination of the vapour pressure of the test item.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
< 1.3 E-8 Pa
< 1.0 E-10 mm Hg
25°C
< 5.5 E-8 Pa
< 4.1 E-10 mm Hg - Executive summary:
The method is validated in the range 10 E-8 - 10E3 Pa using a set of five reference substances with known vapour pressures. The validity of the method was verified maximum one month before this study using hexachlorobenzene as reference control substance. Since the logarithm of the evaporation rate at 20°C (log vT, 20) deviated < 10% from the average value obtained during the validation test, it was possible to apply the constants obtained with the validation test for the determination of the vapour pressure of the test item.
The isothermal TGA effusion method was applied for the determination of the vapour pressure of the test item.
The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
< 1.3 E-8 Pa
< 1.0 E-10 mm Hg
25°C
< 5.5 E-8 Pa
< 4.1 E-10 mm Hg
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