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EC number: 701-247-3
CAS number: -
The ASA Category comprises the following 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)
The appearance of the category members is:
Toluene sulphonic acid - monohydrate crystal as tested. Hygroscopic when dried.
Benzene sulphonic acid - aqueous solution (ca. 65 %) as tested. Hygroscopic when dried.
Hydroxybenzene sulphonic acid - aqueous solution (ca. 65 %) as tested. Hygroscopic when dried.
Cumene sulphonic acid - aqueous solution (ca. 65 %) as tested. Hygroscopic when dried.
(Xylene and ethylbenzene) sulphonic acid- aqueous solution (ca. 65 %) as tested. Hygroscopic when dried.
Physical and chemical properties do not reveal any hazard. The substances are high boiling deliquescent substance, very soluble with low partitioning potential from water, stable, with low density and low vapour pressure; not flammable, nor explosive or oxidising.
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