???? ??
|
|
???? ?? ??
- ???
- 582 °C
- ?? ?
- explodes [HAW93]
- ??
- 3.618
- ?? ??
- 7.9 (vs air)
- ?? ??
- 2-8°C
- ???
- H2O: 0.01 M at 20 °C, ??, ??
- ??? ??
- ??/??
- ??
- ???? ?????
- Specific Gravity
- 3.618
- ??????(pH)
- pH (5g/l, 25℃) : 4.5～5.5
- ??
- ?? ??
- pH ??
- 4.5 - 5.5
- ???
- 0.42g/100mL(20℃)
- Merck
- 14,7654
- crystal system
- square
- Space group
- I41/a
- Lattice constant
a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.5726 0.5726 1.2607 90 90 90
- ???
- ????. ???? - ??? ??? ???? ??? ??? ? ????. ?? ??, ??? ??, ??? ???, ?? ??? ??? ? ????.
- InChI
- 1S/HIO4.K/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1
- InChIKey
- FJVZDOGVDJCCCR-UHFFFAOYSA-M
- SMILES
- [K+].[O-]I(=O)(=O)=O
- CAS ??????
- 7790-21-8(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | O,Xi | ||
|---|---|---|---|
| ?? ???? ?? | 8-36/37/38 | ||
| ????? | 17-26-36-37/39 | ||
| ????(UN No.) | UN 1479 5.1/PG 2 | ||
| WGK ?? | 3 | ||
| F ?????? | 3 | ||
| TSCA | TSCA listed | ||
| ?? ?? | 5.1 | ||
| ???? | II | ||
| HS ?? | 28299000 | ||
| ???? ??? | 5.1A - Strongly oxidizing hazardous materials | ||
| Hazard Classifications | Aquatic Acute 1 Eye Dam. 1 Ox. Sol. 1 Skin Corr. 1C STOT RE 1 |
||
| ???? ?? | KE-29179 |
???? ?? C??? ??, ??, ??
??? ??
colourless crystals or white crystalline powder??? ??
Colorless tetragonal crystals; density 3.618 g/cm3; melts at 582°C; slightly soluble in water at ordinary temperatures, 0.42 g/100mL at 20°C; moderately soluble in hot water, 4.4 g/100mL at 80°C.??
For the colorimetric determination of Mn (oxidizes manganese compounds to permanganates), as oxidizing agentPotassium periodate is used as an oxidizing agent in organic synthesis and an analytical reagent for the determination of potassium and cerium. It is also used in colorimetric estimation of manganese. It reacts with ammonium cerium(IV) nitrate to prepare tris[trinitratocerium(IV)] paraperiodate which finds application as an oxidant.?? ??
Potassium periodate can be prepared by oxidation of potassium iodate with a powerful oxidizing agent such as potassium permanganate, chlorine or bromine in basic solution:IO3ˉ+ Cl2+ 2OHˉ→IO4ˉ+ 2Clˉ+ H2O
Also, the salt may be prepared by electrolysis.
?? ??
Potassium periodate, KlO4, white solid, formed by electrolysis of potassium iodate under proper conditions.?? ??
Potassium (meta)periodate exhibits strong oxidizing properties in acidic medium.???
Fire risk in contact with organic materials, strong oxidizing agent. Strong irritant to tissue.Purification Methods
Crystallise it from distilled water. Its solubility in H2O is 0.2% at 0o, 0.4% at 20o, 4.4% at 80o. and 7.9% at 100o. [Hill Inorg Synth I 171 1939, Schmeisser in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 325 1963.]???? ?? ?? ?? ? ???
???
?? ??
???? ?? ?? ??
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