| Identification | Back Directory | [Name]
Barium manganate | [CAS]
7787-35-1 | [Synonyms]
BARIUM MANGANATE
Bariummanganate,90%
BARIUM MANGANATE(VI)
Bariummanganate,tech.90%
Barium manganate(VI),95%
Manganic acid barium salt
Bariummanganategraygreenxtl
BARIUM MANGANATE: TECH., 90%
BariuM Manganate(VI), 95% 25GR
manganicacid(h2mno4),bariumsalt(1:1) | [EINECS(EC#)]
232-109-6 | [Molecular Formula]
BaMnO4 | [MDL Number]
MFCD00011514 | [MOL File]
7787-35-1.mol | [Molecular Weight]
256.26 |
| Chemical Properties | Back Directory | [Appearance]
blue to dark blue-black fine crystalline powder | [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 | [Exposure limits]
ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 | [InChI]
InChI=1S/Ba.Mn.2H2O.2O.2H/h;;2*1H2;;;;/q;+2;;;;;;/p-2 | [InChIKey]
DYWPICZAWHIQFT-UHFFFAOYSA-L | [SMILES]
[Mn](=O)(=O)(O)O.[Ba] | [EPA Substance Registry System]
Manganic acid (H2MnO4), barium salt (1:1)(7787-35-1) |
| Hazard Information | Back Directory | [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.] |
| Questions And Answer | Back Directory | [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]
- N. Eastaugh, V. Walsh, T. Chaplin, R. Siddall, Pigment Compendium, 2008, ISBN: 978-0-7506-8980-9
- https://en.wikipedia.org/wiki/Barium_manganate
- http://reag.paperplane.io/00000118.htm
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