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EC number: 203-180-0
CAS number: 104-15-4
The calculated vapour pressures of the 5 aromatic sulphonic acids ranged from 1.95 to 69.8 Pa at 20°C
At 50°C, the measured vapour pressures of
the 5 aromatic sulphonic acids ranged from 4.9 to 14.7 kPa. Since the
measured values has been performed on 65% solutions at 35°C, to have a
value to be used for the chemical safety assessment, the calculate
values with EPIWIN (Modified Grain method) have been considered:
Benzene sulphonic acid: 16.7 Pa
p-Toluene sulphonic acid: 1.95 Pa
Hydroxybenzene sulphonic acid: 69.8 Pa
Xylene sulphonic acid: 27.9 Pa
Cumene sulphonic acid: 56.1 Pa
The more conservative value has been
considered for risk evaluation
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