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EC number: 203-180-0
CAS number: 104-15-4
The ASA Category comprises 5 aromatic sulphonic acids:
TSA, Toluene-4-sulphonic acid (EC 203-180-0, CAS 104-15-4)
XSA, (Xylenes and 4-ethylbenzene) sulphonic acid (EC 701-247-3, CAS -) Former EC 246-839-8
CSA, p-cumene sulphonic acid (EC 240-210-1, CAS 16066-35-6)
BSA, Benzene sulphonic acid (EC 202-638-7, CAS 98-11-3)
HBSA, 4-hydroxybenzensulphonic acid (EC No. 202-691-6, CAS No. 98-67-9)
No ignition was found until 465 °C at atmospheric pressure for the 5 Aromatic Sulphonic Acids according to EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
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