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| | Phenoldisulfonic acid Basic information |
| Product Name: | Phenoldisulfonic acid | | Synonyms: | 4-hydroxy-3-benzenedisulfonicacid;4-Hydroxybenzenedisulfonicacid;Phenol-2,4-disulfonicacid;Phenol disulfonic acid solution;PHENOLDISULPHONIC ACID;4-hydroxybenzene-1,3-disulphonic acid;PhenoldisulphonicAcidSolu.25%W/VInSulphonicA;Solution25%wvinsulfuricacid | | CAS: | 96-77-5 | | MF: | C6H6O7S2 | | MW: | 254.24 | | EINECS: | 202-533-6 | | Product Categories: | Intermediates of Dyes and Pigments | | Mol File: | 96-77-5.mol |  |
| | Phenoldisulfonic acid Chemical Properties |
| Melting point | >99.85°C | | Boiling point | 367.45°C (rough estimate) | | density | 1.606 (estimate) | | refractive index | 1.6550 (estimate) | | form | liquid | | pka | -1.13±0.45(Predicted) | | color | Yellow to brown | | Water Solubility | Reacts with water | | EPA Substance Registry System | 1,3-Benzenedisulfonic acid, 4-hydroxy- (96-77-5) |
| TSCA | TSCA listed | | HazardClass | IRRITANT | | PackingGroup | II |
| | Phenoldisulfonic acid Usage And Synthesis |
| Uses | In the manufacture of aminophenoldisulfonic acids which are intermediates in the dye industry. | | Production Methods | Phenoldisulfonic acid is obtained by hydrolysis of the dichloride with ethyl alcohol and/or water. Nitration and reduction of this acid gives 5- amino-4-hydroxy-1,3-benzenedisulfonic acid. 4-Hydroxy-1,3-benzenedisulfonic acid accelerates the rearrangement of cumene hydroperoxide in the Hock – Lang phenol process.
| | Purification Methods | Crystallise the acid from EtOH/diethyl ether. [Beilstein 11 H 250, 11 I 58, 11 II 139, 6 III 522.] |
| | Phenoldisulfonic acid Preparation Products And Raw materials |
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