POTASSIUM TETRATHIONATE
Synonym(s):Potassium tetrathionate;Tetrathionic acid dipotassium salt
- CAS NO.：13932-13-3
- Empirical Formula: K2O6S4
- Molecular Weight: 302.45
- MDL number: MFCD00079233
- EINECS: 237-702-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-24 14:58:30
What is POTASSIUM TETRATHIONATE?
The Uses of POTASSIUM TETRATHIONATE
Used in the preparation of tetrathionate hydrolase assay from Acidithiobacillus caldus, it acts as an energy source.
Definition
ChEBI: A potassium salt composed of potassium and tetrathionate ions in a 2:1 ratio.
Preparation
Potassium tetrathionate is prepared by a similar reaction—the reaction of S2Cl2 with sulphurous acid, followed by KOH neutralization, as shown by the equations.
2H2S03 + S2C12->H2S406+2HCl
H2S406+2KOH -> K2S406 + 2H2O or by the reaction of iodine with K2S2O3.
2K2S203 + I2 -> K2S406+2KI.
The reaction is carried out in an ethanol-water mixture, a medium in which the potassium tetrathionate is insoluble; the K2S406 precipitates as colorless shiny platelets.
General Description
The crystal structure of potassium tetrathionate is monoclinic with a=22.081o, b=7.991o, c=10.108o
Properties of POTASSIUM TETRATHIONATE
| Density | 2.96 g/mL at 25 °C (lit.) |
| storage temp. | 2-8°C |
| solubility | 232g/l |
| InChI | InChI=1S/2K.H2O6S4/c;;1-9(2,3)7-8-10(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2 |
| EPA Substance Registry System | Potassium tetrathionate (13932-13-3) |
Safety information for POTASSIUM TETRATHIONATE
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
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. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. |
Computed Descriptors for POTASSIUM TETRATHIONATE
| InChIKey | UVTKHPSJNFFIDG-UHFFFAOYSA-L |
| SMILES | S([O-])(=O)(=O)SSS([O-])(=O)=O.[K+].[K+] |
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