Registration Dossier
Registration Dossier
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EC number: 232-379-5 | CAS number: 8011-76-5 Substance obtained by treating phosphate rock with sulfuric acid or a mixture of sulfuric and phosphoric acids. Composed primarily of calcium phosphates and calcium sulfate.
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:
- 19 March 2010 – 16 July 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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
- Remarks:
- (isothermal thermogravimetry)
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- < 8.4 other: E-07 Pa
- Conclusions:
- In a GLP-compliant study in accordance with EC A.4 and OECD 104 using the isothermal thermogravimetric effusion method, the vapour pressure of the substance has been determined as < 8.40 x 10E-7 Pa at 20°C.
Reference
The weight loss of the test substance in the range 170°C - 200°C was lower than the weight loss of chrysene at the same temperature.
Based on this, it was safely concluded that vapour pressure of the test substance is lower than the vapour pressure of this reference substance.
The observed weight loss at a temperature of approximately 100°C (around 100 minutes) was expected due to evaporation of water.
Description of key information
In a GLP-compliant study in accordance with EC A.4 and OECD 104 using the isothermal thermogravimetric effusion method, the vapour pressure of the substance has been determined as < 8.40 x 10E-7 Pa at 20°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
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