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Basic Information
CAS No.: 10294-64-1
Name: POTASSIUM MANGANATE
Molecular Structure:
Molecular Structure of 10294-64-1 (POTASSIUM MANGANATE)
Formula: H2Mn O4 . 2 K
Molecular Weight: 197.13
Synonyms: Manganicacid (H2MnO4), dipotassium salt (8CI,9CI); Potassium manganate(VI) (6CI);Dipotassium manganate; Manganese potassium oxide (K2MnO4); Manganese potassiumoxide (MnK2O4); Potassium manganate; Potassium manganate (K2MnO4); Potassiummanganese oxide (K2MnO4)
EINECS: 233-665-2
Density: g/cm3
Melting Point: 190 °C(lit.)
Boiling Point: °Cat760mmHg
Flash Point: °C
Solubility:

Stability

    Stable. Oxidizer - contact with combustible material may lead to fire.Protect from moisture. Incompatible with zinc, finely powdered metals, peroxides,strong reducing agents.

Toxicology

    May act
Appearance: solid
Hazard Symbols:
Risk Codes: 8-36/37/38
Safety:
Hazard Codes O,Xi
Risk Statements 8-36/37/38
Safety Statements 17-26
RIDADR UN 1479 5.1/PG 3
WGK Germany 2
HazardClass 5.1
PackingGroup III
PSA: 80.26000
LogP: -0.47520
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Chemistry

Molecular Structure of Potassium manganate (CAS NO. 10294-64-1):

IUPAC Name: Dipotassium dioxido(dioxo)manganese 
Molecular Formula: K2MnO4
Molecular Weight: 197.132249 g/mol
Melting Point: 190 °C(lit.)
Polar Surface Area: 74.6 Å2
EINECS: 233-665-2
Product Categories: Catalysis and Inorganic Chemistry; Chemical Synthesis; ManganeseMetal and Ceramic Science; Potassium Salts; Salts

Production

There are some ways to synthesis Potassium manganate:

1. The industrial ways:

MnO2 + 2 KOH + ½ O2 → K2MnO4 + H2O

2. In laboratory, it can be synthesized by heating a solution of KMnO4 in concentrated KOH solution
followed by cooling to give green crystals:

4 KMnO4 + 4 KOH → 4 K2MnO4 + O2 + 2 H2O

3.  It can also be made by using iodide as the reducing agent:

KMnO4 + KI → K2MnO4 + ½ I2

Safety Profile

Safety Information of Potassium manganate (CAS NO. 10294-64-1):
Hazard Codes: O Oxidizing, Xi Irritant
Risk Statements: 8-36/37/38
R8: Contact with combustible material may cause fire
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 17-26
S17: Keep away from combustible material
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
RIDADR: UN 1479 5.1/PG 3
WGK Germany: 2
HazardClass: 5.1
PackingGroup: III

Specification

  Potassium manganate with cas registry number of 10294-64-1 is a common chemical used as an intermediate in the industrial synthesis of Potassium permanganate, KMnO4. It is also known as Potassium manganate(VI) ; Manganic acid (H2MnO4), dipotassium salt ; Manganic acid (H2MnO4), potassium salt (1:2) .