Potassium 2,5-dihydroxybenzenesulfonate
Synonym(s):2,5-Dihydroxybenzenesulfonic acid potassium salt;Hydroquinone monosulfonic acid potassium salt;Potassium 2,5-dihydroxybenzenesulfonate
- CAS NO.：21799-87-1
- Empirical Formula: C6H7KO5S
- Molecular Weight: 230.28
- MDL number: MFCD00007475
- EINECS: 244-584-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 04:54:31
What is Potassium 2,5-dihydroxybenzenesulfonate?
Chemical properties
white solid
The Uses of Potassium 2,5-dihydroxybenzenesulfonate
It is employed in the synthesis and properties of sulfonated polyarylene ether nitrile copolymers for PEM with high thermal stability.
Flammability and Explosibility
Not classified
Purification Methods
Recrystallise it from water or EtOH. [Beilstein 11 I 70, 11 II 170, 11 III 570.]
Properties of Potassium 2,5-dihydroxybenzenesulfonate
| Melting point: | 251 °C (dec.)(lit.) |
| Boiling point: | 591.05℃[at 101 325 Pa] |
| Density | 1.74[at 20℃] |
| vapor pressure | 0Pa at 25℃ |
| storage temp. | Store below +30°C. |
| form | powder to crystal |
| color | White to Almost white |
| Water Solubility | soluble |
| BRN | 5187027 |
| Stability: | Stable. Incompatible with bases, oxidizing agents. |
| CAS DataBase Reference | 21799-87-1(CAS DataBase Reference) |
| EPA Substance Registry System | Benzenesulfonic acid, 2,5-dihydroxy-, monopotassium salt (21799-87-1) |
Safety information for Potassium 2,5-dihydroxybenzenesulfonate
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Potassium 2,5-dihydroxybenzenesulfonate
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