Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The ASA Category comprises 5 aromatic sulphonic acids but only TSA, Toluene-4-sulphonic acid (EC 203-180-0, CAS 104-15-4) is a solid for which the particle size was determined. The D50 was 346.7 µm.


For the other category members:


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 study does not need to be conducted since the substances are marketed or used in a non-solid or granular form, the particle size was waived.

Additional information