Barium manganate

Basic information Description References Safety Related Supplier

Barium manganate Basic information

Product Name:
Barium manganate
CAS:
7787-35-1
MF:
BaMnO4
MW:
256.26
EINECS:
232-109-6
Mol File:
7787-35-1.mol
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Barium manganate Chemical Properties

Density 
4.85 g/mL at 25 °C(lit.)
form 
Fine Crystalline Powder
color 
Blue to dark blue-black
Specific Gravity
4.85
Water Solubility 
Slightly soluble in water
Sensitive 
Moisture Sensitive
Merck 
14,981
EPA Substance Registry System
Manganic acid (H2MnO4), barium salt (1:1) (7787-35-1)
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Safety Information

Hazard Codes 
Xn,O
Risk Statements 
20/22-8
Safety Statements 
28-28A
RIDADR 
UN 1479 5.1/PG 2
WGK Germany 
1
21
TSCA 
Yes
HazardClass 
5.1
PackingGroup 
III
HS Code 
28416900

MSDS

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Barium manganate Usage And Synthesis

Description

Barium manganate (chemical formula BaMnO4) is a type of manganates in which the manganese is in a +6 oxidation state. It is obtained by heating manganese dioxide with barium carbonate or nitrate, or by precipitating potassium manganate with barium chloride.1 Barium manganate gives a green pigment, which was used to make manganese blue. Barium manganate can be used in the oxidation of a variety of functional groups efficiently and selectively: alcohols to carbonyls, alcohols to aldehydes, diols to lactones, thiols to disulfides, aromatic amines to azo-compounds, hydroquinone to p-benzoquinone, benzylamine to benzaldehyde, etc. 2,3

References

  1. N. Eastaugh, V. Walsh, T. Chaplin, R. Siddall, Pigment Compendium, 2008, ISBN: 978-0-7506-8980-9
  2. https://en.wikipedia.org/wiki/Barium_manganate
  3. http://reag.paperplane.io/00000118.htm

Chemical Properties

blue to dark blue-black fine crystalline powder

Uses

As pigment in fresco painting instead of Scheele's green because not so poisonous as latter. As mild oxidizing agent in organic synthesis.

Purification Methods

Wash the salt with conductivity H2O by decantation until the supernatant gives a faint test for Ba2+ . Remove excess H2O in a vacuum (IMPORTANT), then heat at 100o and the last traces of H2O are removed in a vacuum desiccator over P2O5. Store it over KOH. It disproportionates in hot H2O or dilute acid into Ba(MnO2)2 and MnO2, and is a mild oxidant. [Schlezinger & Siems J Am Chem Soc 46 1965 1924, Nyholm & Woolliams Inorg Synth XI 56 1968.]

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J & K SCIENTIFIC LTD.
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Beijing Ouhe Technology Co., Ltd
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010-82967028-
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Basic information Description References Safety Related Supplier