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Physical & Chemical properties

Appearance / physical state / colour

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Reference
Endpoint:
appearance / physical state / colour
Type of information:
other: qualitative assessment
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Appearance, physical state and colour at 25°C have been qualitative assessed by visual estimation of many hundreds of samples, confirmed by all members of the consotium and confirmed by melting and boiling point measurements for physical state.
Physical state at 20°C and 1013 hPa:
liquid
Form:
paste
Colour:
brownish
Odour:
odourless
Substance type:
organic
Conclusions:
The substance is a deliquescent white solid odourless

Description of key information

The substance is a deliquescent white solid odourless

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
liquid

Additional information

Physical-Chemical testing was conducted by Slovnaft Vurup, a.s., Department of Testing Laboratories, in July and August 2010.

There are 5 aromatic sulphonic acids that were tested for physical-chemical properties in 2010. The appearance of those samples at 20°C was:

Benzene sulphonic acid (CAS No. 98-11-3) - aqueous solution (ca 65%) as tested. Hygroscopic when dried.

Hydroxybenzene sulphonic acid (CAS No. 1333-39-7) - aqueous solution (ca 65%) as tested. Hygroscopic when dried.

Cumene sulphonic acid (CAS No. 37953-05-2) - aqueous solution (ca 65%) as tested. Hygroscopic when dried.

Xylene sulphonic acid (CAS No. 25321-41-9) - aqueous solution (ca 65%) as tested. Hygroscopic when dried.

Toluene sulphonic acid (CAS No. 104-15-4) - monohydrate crystal as tested. Hygroscopic when dried.