Basic information
- CAS
7790-21-8- Standard SMILES
[K+].[O-][I+3]([O-])([O-])[O-]- InChIKey
WZIUPTUZHCSBAA-UHFFFAOYSA-N- Molecular formula
- I.K.O4
- Average molar mass
- 230 g/mol
- Monoisotopic mass
- 229.84783816
Names & identifiers
- Preferred name
- Potassium periodate
- IUPAC
- potassium periodate
- English name
- Potassium periodate
- Molecular formula
- H2IKO4
- Molecular weight
- 232.01
Names & synonyms
Potassium periodate7790-21-8POTASSIUM METAPERIODATEQ3LOC6P66LDTXSID90894076Periodic acid (HIO4), potassium salt (1:1)RefChem:867964DTXCID301324119232-196-0potassium;periodateUNII-Q3LOC6P66LEINECS 232-196-0
Show more names
ACS， 99.8%-100.3%Potassium ｍ-PeriodaPOTASSIUM M-PERIODATEPotassiumPeriodateKIO4Potassium periodate 99%PotassiumMetaperiodateGrpotassium periodate, acsPotassium metaperiodiate
Periodic acid (HIO4), potassium saltMFCD00011407IKO4POTASSIUM IODATE (KIO4)POTASSIUM PERIODATE [MI]K (I O4)AKOS015901592NS00046869
Database identifiers
- CAS
7790-21-8- PubChem CID
- 516896
- DTXSID
DTXSID90894076- UNII
- Q3LOC6P66L
- EC Number
- 232-196-0
- Nikkaji
- J43.936C
Properties
Computed structural properties
- Topological polar surface area
- 74.3 Ų
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 6
- Formal charge
- 0
- Complexity
- 118
Experimental & physicochemical properties
Chemical ClassesOther Classes -> Halogens, Inorganic Compounds
Density3.618 @ 15°C
Physical DescriptionColorless or white solid; [Hawley] Colorless odorless powder; [MSDSonline]
Physicochemical properties
- Melting point
- 582 °C · 582 °C
- Boiling point
- 93 · explodes [HAW93]
- Density
- 3.618 · 3.618
- vapor density
- 7.9 · 7.9 (vs air)
- storage temp.
- 2 · 2-8°C
- solubility
- 2 O: · H2O: 0.01 M at 20 °C, clear, colorless
- form
- Powder/Solid
- color
- White to off-white
- Specific Gravity
- 3.618 · 3.618
- PH
- 5 g/l, · pH (5g/l, 25℃) : 4.5～5.5
- Odor
- Odorless
- PH Range
- 4.5 · 4.5 - 5.5
- Oxidising Properties
- 2 · The substance or mixture is classified as oxidizing with the subcategory 2
- Water Solubility
- 0.42 g/100 · 0.42 g/100 mL (20 ºC)
- Merck
- 14 · 14,7654
- crystal system
- square
- Space group
- 41 · I41/a
- Lattice constant
- a/nm
- Symbol(GHS)
- 3 · GHS03,GHS07
- Signal word
- Danger
- Hazard statements
- 272 · H272-H315-H319-H335
- Precautionary statements
- 264 · P264-P280-P261-P271-P302+P352-P332+P313-P362+P364-P305+P351+P338-P337+P313-P304+P340-P312-P403+P233-P405-P501
- target organs
- Thyroid
- Hazard Codes
- O,Xi
- Risk Statements
- 8 · 8-36/37/38
- Safety Statements
- 17 · 17-26-36-37/39
- RIDADR
- 1479 · UN 1479 5.1/PG 2
- WGK Germany
- 3 · 3
- F
- 3 · 3
- TSCA
- TSCA listed
- HazardClass
- 5.1 · 5.1
- PackingGroup
- II
- HS Code
- 28299000 · 28299000
- Storage Class
- 5.1 A · 5.1A - Strongly oxidizing hazardous materials
- Hazard Classifications
- 1 Eye · Aquatic Acute 1Eye Dam. 1Ox. Sol. 1Skin Corr. 1CSTOT RE 1
Safety & regulation
GHS classification
GHS Classification
Danger
H272 (96.4%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
P210, P220, P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 56 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Danger
H302: Harmful if swallowed [Warning Acute toxicity, oral]
Hazard information
Regulatory Information
Chemical: Periodic acid (HIO4), potassium salt
Periodic acid, potassium salt: HSNO Approval: HSR001341 Approved with controls
Other Safety InformationIMAP assessments - Periodic acid and its salts: Human health tier II assessment
Hazards Summary
A strong skin, eye, and mucous membrane irritant; [Merck Index] May cause fire on contact with organic substances; A strong oxidizing agent and irritant; [Hawley] A skin and eye irritant; [eChemPortal: ERMA] An oxidizing agent; May cause fire on contact with combustible material; An irritant; [MSDSonline] See Metaperiodic acid.
Hazard Classes and Categories
Ox. Sol. 2 (96.4%)
Acute toxicity (ingestion) - category 4
Safety & protection
Protective Action Criteria (PAC)
1.2 [mg/m3]
13 [mg/m3]
79 [mg/m3]
Safety data
- F
- 3
- wgk
- 3
- tsca
- TSCA listed
- ridadr
- UN 1479 5.1/PG 2
- hs_code
- 28299000
- risk_code
- 8-36/37/38
- Signal word
- Danger
- Symbol(GHS)
- GHS03,GHS07
- hazard_code
- O,Xi
- safety_code
- 17-26-36-37/39
- hazard_class
- 5.1
- Storage Class
- 5.1A - Strongly oxidizing hazardous materials
- packing_group
- II
- target organs
- Thyroid
- Hazard statements
- H272-H315-H319-H335
- Hazard Classifications
- Aquatic Acute 1Eye Dam. 1Ox. Sol. 1Skin Corr. 1CSTOT RE 1
- Precautionary statements
- P264-P280-P261-P271-P302+P352-P332+P313-P362+P364-P305+P351+P338-P337+P313-P304+P340-P312-P403+P233-P405-P501
Chemistry & industry
Uses & manufacturing
UsesUsed as oxidizing agent (in acid solution) for manganese and organic compounds; [Merck Index]
General Manufacturing InformationPeriodic acid (HIO4), potassium salt (1:1): ACTIVE
Applications
DescriptionPotassium periodate (chemical formula: KIO4) is a kind of inorganic salt composed of a potassium cation and a periodate anion. It can be used for the determination of potassium and cerium owing to its low solubility of KIO4. It can be used an oxidizing agent, and as a source of oxygen. It can also be used for the determination of the concentration of other compounds through measuring the reaction between DPC (sc-202590) and KIO4. It can be synthesize through the oxidation of potassium iodate through chlorine and potassium hydroxide, or by the electrochemical oxidation of potassium iodate.
UsesFor 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.
UsesPowerful oxidizer in acid solution, oxidizing manganese Compounds to permanganate; used for this purpose in analytical chemistry (colorimetric estimation of Mn), also for the oxidation of some organic Compounds.
General DescriptionPotassium (meta)periodate exhibits strong oxidizing properties in acidic medium.
Preparation methods
PreparationPotassium 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+ H2OAlso, the salt may be prepared by electrolysis.
Upstream & downstream products
Upstream raw materials
Downstream products
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Related reactions
19 records
Compound notes
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