???? ??
|
|
???? ?? ??
- ???
- 325 °C
- ?? ??
- 830kg/m3
- ??
- 2.28 g/mL at 25 °C (lit.)
- ?? ??
- no restrictions.
- ???
- H2O: 0.1 M at 20 °C, ??, ??
- ??? ??
- ??
- ??? ??
- ??? ??
- Specific Gravity
- 2.28
- ??
- ???
- ??????(pH)
- 0.8 (50g/l, H2O, 20℃)
- ??
- ?? ??
- pH ??
- 1 - 2 at 25.5 g/l at 25 °C
- ???
- ??? ? ??
- ??
- Hygroscopic
- Merck
- 14,7664
- ???
- ????. ??, ???? ???? ????.
- InChI
- 1S/2K.H2O7S2/c;;1-8(2,3)7-9(4,5)6/h;;(H,1,2,3)(H,4,5,6)/q2*+1;/p-2
- InChIKey
- KAQHZJVQFBJKCK-UHFFFAOYSA-L
- SMILES
- [K+].[K+].[O-]S(=O)(=O)OS([O-])(=O)=O
- CAS ??????
- 7790-62-7(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | C | ||
|---|---|---|---|
| ?? ???? ?? | 34 | ||
| ????? | 26-36/37/39-45 | ||
| ????(UN No.) | UN 3260 8/PG 2 | ||
| WGK ?? | 3 | ||
| TSCA | TSCA listed | ||
| HS ?? | 2833 29 80 | ||
| ?? ?? | 8 | ||
| ???? | II | ||
| ???? ??? | 6.1B - Non-combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
||
| Hazard Classifications | Acute Tox. 3 Inhalation Eye Dam. 1 Skin Corr. 1A |
||
| ???? ?? | KE-12142 |
???? ?? C??? ??, ??, ??
??? ??
Potassium pyrosulphate, also known as potassium disulfate, appears as colorless needles or as a white crystalline powder or fused pieces. It is soluble in water, converting to potassium bisulfate. Specifically, it dissolves in cold water but decomposes in hot water to form potassium sulfate. It melts below 300?°C and decomposes at higher temperatures. This compound exhibits strong oxidizing properties and can form sulfates through eutectic fusion with certain metal oxides that are insoluble in water and acids.??
Acid flux in analysis, laboratory reagent.?? ??
Potassium disulfite (Potassium pyrosulfate) has been synthesized from potassium hydrogen sulfate, via melting.?? ??
[1] P.J. MINEELY S. A T. Molten potassium pyrosulfate: The reactions of seven metal oxalates[J]. Thermochimica Acta, 1987, 114 2: Pages 281-286. DOI:10.1016/0040-6031(87)80049-7.[2] CHUNBIN GUO. A novel perspective process for alumina extraction from coal fly ash via potassium pyrosulfate calcination activation method[J]. Journal of Cleaner Production, 2020, 271 1: 122703. DOI:10.1016/j.jclepro.2020.122703.
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