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Description of key information

No experimental data are existing for the substances of the category. The Henry's law constant has been estimated with HENRYWIN v3.20, Bond method and the results are reported below:

BSA, CAS: 98-11-3; 2.55  e-004 Pa-m3/mole

TSA, CAS: 104-15-4; 2.81  e-004 Pa-m3/mole

XSA, CAS: 25321-41-9; 3.11E-004 Pa-m3/mole

CSA, CAS: 16066-35-6; 4.96 e-004 Pa-m3/mole

HBSA, CAS: 98-67-9; 2.65  e-008  Pa-m3/mole

The value of HBSA has been selected as representative key value of the category for the Chemical Safety Assessment

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

Henry's Law Constant characterizes the equilibrium of dilute concentrations of volatile, soluble substances between the gas and liquid phases. The aromatic sulphonic acids are not volatile and therefore a Henry's Law Constant is not feasible or relevant. An indicative value to complete the Chemical safety assessment has been calculated with EPIWIN 4.1. The value 0.0000000265 has been reported as key value for safety assessment, as conservative case.