| Identification | More | [Name]
Potassium periodate | [CAS]
7790-21-8 | [Synonyms]
PERIODIC ACID POTASSIUM SALT
POTASSIUM METAPERIODATE
POTASSIUM M-PERIODATE
POTASSIUM PERIODATE
POTASSIUM PERIODATE, META
periodicacid(hio4),potassiumsalt
Periodicacid(HIO4)potassiumsalt
Potassium periodate 99.8+ % for analysis
POTASSIUM TETROXOIODATE(VII)
Potassium ｍ-Perioda
POTASSIUM PERIODATE, 99.8%, A.C.S. REAGE NT
POTASSIUM (META)PERIODATE, ACS
POTASSIUM PERIODATE, 99.9+%
POTASSIUM PERIODATE 99.8% &
POTASSIUM TETROXOIODATE(VII) R. G., REAG . ACS
PotassiumMetaperiodateGr
PotassiumPeriodateKIO4
PotassiumMetaperiodateExtraPure
Potassium periodate, 99+%
Potassiumperiodate,ACS,99.8%-100.3% | [EINECS(EC#)]
232-196-0 | [Molecular Formula]
IKO4 | [MDL Number]
MFCD00011407 | [Molecular Weight]
230 | [MOL File]
7790-21-8.mol |
| Chemical Properties | Back Directory | [Appearance]
colourless crystals or white crystalline powder | [Melting point ]
582 °C
| [Boiling point ]
explodes [HAW93] | [density ]
3.618 | [vapor density ]
7.9 (vs air) | [storage temp. ]
2-8°C
| [solubility ]
H2O: 0.01 M at 20 °C, clear, colorless
| [form ]
Powder/Solid | [color ]
White to off-white | [Specific Gravity]
3.618 | [Odor]
Odorless | [PH]
pH (5g/l, 25℃) : 4.5～5.5 | [PH Range]
4.5 - 5.5 | [Stability:]
Stable. Strong oxidizer-contact with combustible materials may cause fire. Incompatible with organic material, combustible material, strong reducing agents, powdered metals. | [Water Solubility ]
0.42 g/100 mL (20 ºC) | [Merck ]
14,7654 | [CAS DataBase Reference]
7790-21-8(CAS DataBase Reference) | [EPA Substance Registry System]
7790-21-8(EPA Substance) |
| Hazard Information | Back Directory | [Chemical Properties]
colourless crystals or white crystalline powder | [Uses]
Powerful 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. | [Hazard]
Fire risk in contact with organic materials,
strong oxidizing agent. Strong irritant to tissue.
| [Physical properties]
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. | [Preparation]
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. | [Production Methods]
Potassium periodate, KlO4, white solid, formed by electrolysis of potassium iodate under proper conditions. | [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.] | [General Description]
Potassium (meta)periodate exhibits strong oxidizing properties in acidic medium. |
| Safety Data | Back Directory | [Hazard Codes ]
O,Xi | [Risk Statements ]
R8:Contact with combustible material may cause fire.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S17:Keep away from combustible material .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection . | [RIDADR ]
UN 1479 5.1/PG 2
| [WGK Germany ]
3
| [F ]
3 | [TSCA ]
Yes | [HazardClass ]
5.1 | [PackingGroup ]
II | [HS Code ]
28299000 |
| Questions And Answer | Back Directory | [Description]
Potassium 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. | [References]
https://www.scbt.com/scbt/product/potassium-periodate-7790-21-8
https://en.wikipedia.org/wiki/Potassium_periodate
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