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7790-21-8

Basic Information
CAS No.: 7790-21-8
Name: Potassium periodate
Article Data: 32
Molecular Structure:
Molecular Structure of 7790-21-8 (Potassium periodate)
Formula: HIO4.K
Molecular Weight: 230
Synonyms: Periodicacid (HIO4), potassium salt (8Cl,9Cl);Potassium periodate (KIO4) (6Cl);Potassium iodate (KIO4);Potassium metaperiodate;
EINECS: 232-196-0
Density: 3.618 g/cm3
Melting Point: 582 °C, 855 K, 1080 °F
Solubility: Water: 0.42 g/100 mL (20 °C)
Appearance: White powder
Hazard Symbols: OxidizingO,IrritantXi
Risk Codes: 8-36/37/38
Safety: 17-26-36-37/39
Transport Information: UN 1479 5.1/PG 2
PSA: 74.27000
LogP: 0.41050
Synthetic route
7758-05-6

potassium iodate

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
With potassium hydroxide In not given equiv. amt. of KOH is 4-5, Cl2 intoduction between mixing,cooling, lightly acidify with H2SO4; washing, drying;95%
With KOH In not given equiv. amt. of KOH is 4-5, Cl2 intoduction between mixing,cooling, lightly acidify with H2SO4; washing, drying;95%
With fluorine In water strongly alkaline solution, about 2n with KOH; after taking samples for analysis, some concd. KOH soln. is added again;;48.5%
7681-11-0

potassium iodide

potassium hydroxide

A

7758-05-6

potassium iodate

B

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
In water dissolving 80g KI and 40g KOH in 500ml H2O; 24h at 250°C with O2 pressure of 90 - 100 atm;; product mixture;;A 82.3%
B 25.4%
In water dissolving 80g KI and 40g KOH in 500ml H2O; 36h at 250°C with O2 pressure of 90 - 100 atm;; product mixture;;A 82.5%
B 24.5%
In water dissolving 80g KI and 40g KOH in 500ml H2O; 24h at 250°C with O2 pressure of 90 - 100 atm;; product mixture;;A 82.3%
B 25.4%
7758-05-6

potassium iodate

7782-41-4

fluorine

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
In not given KIO4 decompd. with the formed H2O2, in concd. KOH soln.;48.5%
In not given KIO4 decompd. with the formed H2O2, in concd. KOH soln.;48.5%
584-08-7

potassium carbonate

10450-60-9

periodic acid

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
In not given repeated recrystn. (H2O);
7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
In water passing O3 into alkaline solution; 5-10% KOH-soln. containing 10% saturated KIO3-soln.; at first no pptn., since a soluble basic periodate forms intermediately;; pptn. of KIO4 on addn. of acetic acid;;
In water passing O3 into alkaline solution; 5-10% KOH-soln. containing 10% saturated KIO3-soln.; at first no pptn., since a soluble basic periodate forms intermediately;; pptn. of KIO4 on addn. of acetic acid;;
7681-11-0

potassium iodide

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
With ozone In water other products formed too;
With O3 In water other products formed too;
7681-11-0

potassium iodide

A

7758-05-6

potassium iodate

B

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
With oxygen High Pressure; with satd. soln. of KI, at higher temp., under higher pressure;
With O2 High Pressure; with satd. soln. of KI, at higher temp., under higher pressure;
7681-11-0

potassium iodide

A

7758-05-6

potassium iodate

B

7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
With potassium hydroxide In water at 250°C at 90-100 atm. O2-pressure; in strongly alkaline KOH soln.;;
With KOH In water at 250°C at 90-100 atm. O2-pressure; in strongly alkaline KOH soln.;;
7790-21-8

potassium metaperiodate

Conditions
ConditionsYield
With alkali hydroxide In water Electrolysis; with clay diaphragm; Pt electrodes; clay cell filled with alkali hydroxide soln., outside alkaline IO3(1-) soln.; low temp., low current density, at least 4% alkali soln.;; pptn. at neutralization;;
With alkali hydroxide In water Electrolysis; with clay diaphragm; Pt electrodes; clay cell filled with alkali hydroxide soln., outside alkaline IO3(1-) soln.; low temp., low current density, at least 4% alkali soln.;; pptn. at neutralization;;
7790-21-8

potassium metaperiodate

102-07-8

bis(diphenyl)urea

101-99-5

N-carboethoxyaniline

Conditions
ConditionsYield
96%
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    Potassiumperiodate; Periodicacidpotassiumsalt

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  • Periodic acid (HIO<sub>4</sub>),potassium salt (1:1)

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    Periodic acid (HIO4),potassium salt (1:1)

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    Periodic acid (HIO4),potassium salt (1:1)Appearance:Off white to slight yellow solid Storage:Stored in shaded, cool and dry places Package:1L 5L 10L 25L bottle Application:pharma intermediate Transportation:Handle with cares to avoid damaging the pac

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    Potassium periodate

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    use in pharmacutical industries. Appearance:WHITE CRYSTALLINE POWDER Storage:AT ROOM TEMPRATURE

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Standards and Recommendations

Federal and State Regulations: TSCA 8(b) inventory: Potassium periodate
Other Regulations: OSHA: Hazardous by definition of Hazard Communication Standard (29 CFR 1910.1200).

Specification

The Potassium periodate with CAS registry number of 7790-21-8 is also known as Potassium metaperiodate. The IUPAC name and product name are the same. It belongs to product categories of Inorganics. Its EINECS registry number is 232-196-0. In addition, the formula is HIO4.K and the molecular weight is 230.00. The chemical is a white powder and should be sealed at the temperature of 2-8 °C. What's more, It is used as analytical reagent and oxidant.

Physical properties about Potassium periodate are: (1)#H bond acceptors: 4; (2)#H bond donors: 1; (3)Exact Mass: 229.847833; (4)MonoIsotopic Mass; 229.847833; (5)Topological Polar Surface Area: 74.3; (6)Heavy Atom Count: 6; (7)Complexity: 118; (8)Covalently-Bonded Unit Count: 2.

Preparation of Potassium periodate. Potassium iodate is dissolved in 30% potassium hydroxide solution and heated to boiling. Then persulfate is added repeatedly to the reaction mixture under stirring.

KIO3+K2S2O8+2KOH=KIO4+2K2SO4+H2O

When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. When contacting with combustible material, it may cause fire. During using it, wear suitable protective clothing, gloves and eye/face protection. Keep away from combustible material. If contact with eyes accidently, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: [O-]I(=O)(=O)=O.[K+]
2. InChI: InChI=1S/HIO4.K/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1
3. InChIKey: FJVZDOGVDJCCCR-UHFFFAOYSA-M