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EC number: 203-180-0
CAS number: 104-15-4
The melting/freezing points for the 5 aromatic sulphonic acids were all 30°C or below; the range was -23 to 30°C.
A medium value for Chemical Safety
Assessment has been choosen, representing the real impact of those
substances in environmental conditions. They are indeed very igroscopic,
then deliquescents even below their melting point. The consequence is
that most of them at 25°C are in fact liquid
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