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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Justification for type of information:
Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.
Reason / purpose:
read-across source
Temp.:
20 °C
Vapour pressure:
<= 0.005 Pa

Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.

Conclusions:
vapour pressure: <=0.0048 Pa
Executive summary:

In the Klimisch 2 non-GLP study from Kintrup (2013) the vapour pressure of Sodium bis(C11-14-isoalkyl, C13-rich) sulfosuccinate was calculated using the melting and boiling point. An estimation procedure in accordance with the test method OECD Guideline 104 “OECD Guideline For The Testing Of Chemicals, adopted by the Council on 23 March 2006, Vapour Pressure” ANNEX Estimation Method newest version (Robert S. Boethling, Donald Mackay, Handbook of Property Estimation Methods for Chemicals, Lewis Publishers, year of publication 2000, Cap. 3 - Vapour Pressure, Grain-Watson Method, p. 53 – 65) was used. This method is applied for vapour pressures between 10^3 to 10^-7 mbar. This deviates from the older version published in OECD Guideline 104. It was used due to the differentiation between solids and liquids, which results in a more precise estimate.

Using a melting point of 235 °C and a boiling point of 270 °C (both values might be underestimations due to decomposition) resulted in a finding that the test item has a vapour pressure of ≤ 4.8*10-3Pa at 20 °C according to the definition in the OECD Guideline 104 (Grain-Watson estimation).

Testing for CAS 55184-72-0 is covered by tests with CAS 848588-96-5. Both substances are very similar since they differ mainly in the share of C13 (CAS 848588-96-5 C13> 80%; CAS 55184-72-0 > 95%). Hence, read across from CAS 848588-96-5 (source) to CAS 55184-72-0 (target) is considered as appropriate for both substances.

This value is considered reliable for the further risk assessment.

Description of key information

vapour pressure ≤ 4.8*10-3Pa at 20 °C

Key value for chemical safety assessment

Vapour pressure:
0.005 Pa
at the temperature of:
20 °C

Additional information

In the Klimisch 2 non-GLP study from Kintrup (2013) the vapour pressure of Sodium bis(C11-14-isoalkyl, C13-rich) sulfosuccinate was calculated using the melting and boiling point. An estimation procedure in accordance with the test method OECD Guideline 104 “OECD Guideline For The Testing Of Chemicals, adopted by the Council on 23 March 2006, Vapour Pressure” ANNEX Estimation Method newest version (Robert S. Boethling, Donald Mackay, Handbook of Property Estimation Methods for Chemicals, Lewis Publishers, year of publication 2000, Cap. 3 - Vapour Pressure, Grain-Watson Method, p. 53 – 65) was used. This method is applied for vapour pressures between 10^3 to 10^-7 mbar. This deviates from the older version published in OECD Guideline 104. It was used due to the differentiation between solids and liquids, which results in a more precise estimate.

Using a melting point of 235 °C and a boiling point of 270 °C (both values might be underestimations due to decomposition) resulted in a finding that the test item has a vapour pressure of ≤ 4.8*10-3Pa at 20 °C according to the definition in the OECD Guideline 104 (Grain-Watson estimation).

This value is considered reliable for the further risk assessment.