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EC number: 201-248-4 | CAS number: 80-08-0
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- August 24 - November 17, 2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Refer chapter 13 for the detailed structural analogue justification.
- Reason / purpose for cross-reference:
- read-across: supporting information
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Remarks:
- isothermal thermogravimetric effusion method
- Temp.:
- 20 °C
- Vapour pressure:
- < 0.002 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- < 0.004 Pa
- Conclusions:
- The vapour presure of source sunbstance 3,3 'DDS is estimated to be < 1.5.10-3 Pa at 20°C (293K) and < 4.2.10-3 Pa at 25°C (298K).
- Executive summary:
A GLP compliant test was carried out with source substance 3,3 DDS according to Guideline EU method A.4: and OECD Guideline no.104. The isothermal TGA effusion method was applied for the determination of the vapour pressure of 3,3'-DDS. Its vapour pressure was < 1.5.10-3Pa at 20°C (293K) and < 4.2.10-3Pa at 25°C (298K).
No significant weight loss of the test substance was observed below the melting temperature of the test substance (i.e. a relatively low vapour pressure was obtained).
Based on ttest results, the vapour pressure for 3,3'DDS can be estimated to be < 1.5.10-3Pa at 20°C (293K) and < 4.2.10-3Pa at 25°C (298K).
Reference
Description of key information
Based on the isothermal TGA effusion method used for the read across substance (3,3'-DDS), the vapour pressure for 4,4'DDS can be estimated to be < 1.5.10-3 Pa at 20°C (293K) and < 4.2.10-3 Pa at 25°C (298K).
Key value for chemical safety assessment
- Vapour pressure:
- 0.004 Pa
- at the temperature of:
- 25 °C
Additional information
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