Registration Dossier
Registration Dossier
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EC number: 242-809-3 | CAS number: 19090-60-9
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- 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 guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
Test material
- Reference substance name:
- Adipic acid, ammonium salt
- EC Number:
- 242-809-3
- EC Name:
- Adipic acid, ammonium salt
- Cas Number:
- 19090-60-9
- Molecular formula:
- C6H10O4.xH3N
- IUPAC Name:
- ammonium 5-carboxypentanoate
- Test material form:
- solid: crystalline
1
Results and discussion
Vapour pressureopen allclose all
- Key result
- Test no.:
- #1
- Temp.:
- ca. 20 °C
- Vapour pressure:
- ca. 0 Pa
- Test no.:
- #2
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 0 Pa
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test item Ammonium Adipate was calculated by extrapolation of
the measured vapour pressure curve for the temperatures 20 and 25 °C:
Vapour pressure of Ammonium Adipate at 20 °C: 4.598 x 10-7 Pa
Vapour pressure of Ammonium Adipate at 25 °C: 1.542 x 10-6 Pa - Executive summary:
The test item was filled into the Knudsen cell before the test and was attached to the
ultrabalance. After that, the system was closed and the apparatus was evacuated. The
method stages had been programmed for various temperatures with a time of 60 minutes per
stage. A total of 11 stages were prepared for the entire measurement. The series of stages
commenced at the lowest desired measuring temperature. While measuring each single
segment, the decrease of weight of the Knudsen cell was measured by the balance. Taking
into account the geometry of the Knudsen cell orifice, physical data of the test item and the
evaporation rate Δm/Δt the vapour pressure was calculated.
The vapour pressure of the test item Ammonium Adipate was calculated by extrapolation of
the measured vapour pressure curve for the temperatures 20 and 25 °C:
Vapour pressure of Ammonium Adipate at 20 °C: 4.598 x 10-7 Pa
Vapour pressure of Ammonium Adipate at 25 °C: 1.542 x 10-6 Pa
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