Phenol sulfonic acids
| Phenol sulfonic acids | ||||||
| Surname | 2-phenolsulfonic acid | 3-phenolsulfonic acid | 4-phenolsulfonic acid | |||
| other names |
o -Phenolsulfonic acid 2-Hydroxybenzenesulfonic acid Sozenic acid |
m -phenolsulfonic acid 3-hydroxybenzenesulfonic acid |
p -phenolsulphonic acid 4-hydroxybenzenesulphonic acid |
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| Structural formula |
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| CAS number | 609-46-1 | 585-38-6 | 98-67-9 | |||
| PubChem | 11867 | 11451 | 4765 | |||
| ECHA InfoCard | 100.009.266 | 100,008,688 | 100.002.447 | |||
| Molecular formula | C 6 H 6 O 4 S | |||||
| Molar mass | 174.18 g mol −1 | |||||
| Physical state | firmly | firmly | ||||
| Brief description | yellowish solid | colorless crystal needles | ||||
| Melting point | 145 ° C (decomposition) | 50 ° C (decomposition) | ||||
| boiling point | ||||||
| solubility | soluble in water | |||||
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GHS labeling |
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| H and P phrases | no H-phrases | no H-phrases | 314-290 | |||
| see above | see above | no EUH phrases | ||||
| see above | see above | 280-305 + 351 + 338-310 | ||||
The phenol sulfonic acids (or hydroxybenzenesulfonic acids) form a group of substances in chemistry that is derived from both phenol and benzenesulfonic acid. The structure consists of a benzene ring with attached hydroxyl (–OH) and sulfonic acid groups (–SO 2 OH) as substituents . Their different arrangement results in three constitutional isomers with the empirical formula C 6 H 6 O 4 S. 2-Phenolsulfonic acid is rarely referred to by its common name as socolic acid.
properties
The phenolsulfonic acids are colorless to yellowish solids or liquids.
presentation
2-phenol and 4-phenolsulfonic acid can be prepared by sulfonation of phenol with concentrated sulfuric acid are recovered, wherein a mixture of the two compounds occurs. Another, more vigorous sulfonation of the phenol leads to phenol-2,4-disulfonic acid .
Individual evidence
- ↑ David R. Lide, George WA Milne, Handbook of Data on Common Organic Compounds, ISBN 0-8493-0404-0 .
- ↑ Entry on hydroxybenzenesulfonic acids. In: Römpp Online . Georg Thieme Verlag, accessed on April 28, 2019.
- ↑ a b Entry for CAS no. 98-67-9 in the GESTIS substance database of the IFA , accessed on December 27, 2019(JavaScript required) .
- ^ Beyer / Walter : Textbook of Organic Chemistry , 19th edition, S. Hirzel Verlag, Stuttgart 1981, ISBN 3-7776-0356-2 , p. 467.