Registration Dossier
Registration Dossier
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EC number: 217-895-0 | CAS number: 2001-94-7
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: peer reviewed
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM method E1719
- Principles of method if other than guideline:
- Standard Test Method for Vapor Pressure of Liquids by Ebulliometry
- GLP compliance:
- not specified
- Type of method:
- other: Standard Test Method for Vapor Pressure of Liquids by Ebulliometry
- Test no.:
- #1
- Temp.:
- ca. 104 °C
- Vapour pressure:
- ca. 760 mm Hg
- Remarks on result:
- other: Boiling Point
- Test no.:
- #2
- Temp.:
- ca. 25 °C
- Vapour pressure:
- ca. 21.13 mm Hg
- Conclusions:
- Using the Antoine parameters, the normal boiling point (VP at 760 mmHg) of the sample is 104.0 °C, and the vapor pressure at 25 ° is 21.13 mmHg.
Reference
The measured vapor pressure data was correlated to the Antoine equation using the Thermal ANTOINE program using Thomson’s rule to constrain the C value.Using the Antoine parameters, the normal boiling point (VP at 760 mmHg) of the sample is 104.0 °C, and the vapor pressure at 25 ° is 21.13 mmHg.
Description of key information
No experimental data is available for disodium dihydrogen ethylenediaminetetraacetate. Read across to editic acid was done instead.
The vapour pressure of edetic acid was determined to be 2E-012 hPa at 25°C according to Riedel and Plank.
The measured vapor pressure data was correlated to the Antoine equation using the Thermal ANTOINE program using Thomson’s rule to constrain the C value.Using the Antoine parameters, the normal boiling point (VP at 760 mmHg) of the sample is 104.0 °C, and the vapor pressure at 25 ° is 21.13 mmHg.
Key value for chemical safety assessment
Additional information
The vapour pressure determined for the acid form of EDTA represents also a worst case (highest) value for its sodium salts as it is belived that only the free acid can evaporate. In conclusion the value extrapolated for the free acid will also be used for the exposure calculations of the sodium salts in the chemical safety report, reflecting a worst case assumption.
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