Registration Dossier
Registration Dossier
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EC number: 939-603-7 | CAS number: 1471316-72-9
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
- vapour pressure at 25°C: 0.01 Pa [read-across from supporting substance 'Benzenesulfonic acid, mono-C20-24-alkyl derivs., magnesium salts' (CAS# 231297-75-9)]
- vapour pressure at 99°C: 0.457 Pa [read-across from supporting substance 'Benzenesulfonic acid, mono-C20-24-alkyl derivs., magnesium salts' (CAS# 231297-75-9)]
Key value for chemical safety assessment
- Vapour pressure:
- 0.01 Pa
- at the temperature of:
- 25 °C
Additional information
A GLP guideline study of the C10-C14 substance was conducted on the UVCB substance ‘Benzenesulfonic acid, di-C10-14-alkyl derivatives, calcium salts’ as it is produced, supplied and marketed, i.e. in the presence of a liquid mineral oil solvent that changes the physical state of the substance from solid to liquid. However, this study was disregarded because the experimentally determined vapour pressure of the test item was not in the recommended range of the used method. An estimation procedure according to EU Method A.4 "Vapour Pressure according to the Dynamic Method" that was calculated for ‘Benzenesulfonic acid, di-C10-14-alkyl derivatives, calcium salts’ also was disregarded because it represents the solid form, not the product as manufactured or processed by downstream users. Therefore, the calculated vapour pressure for this (solid) mono-constituent substance was considered not representative for the (liquid) UVCB substance being placed on the market in the EU and subsequently was disregarded and not used for risk assessment.
The experimental result from the supporting substance 'Benzenesulfonic acid, mono-C20-24-alkyl derivs., magnesium salts' (CAS# 231297-75-9) was used for this risk assessment because it is structurally similar to ‘Benzenesulfonic acid, di-C10-14-alkyl derivatives, calcium salts’ and has a similar molar weight. Therefore, the vapour pressure of the C20-24 mono-alkylated benzene sulfonate (0.01 Pa at 25°C) is expected to be similar to ‘Benzenesulfonic acid, di-C10-14-alkyl derivatives, calcium salts’ and acceptable for read across.
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