7787-35-1 Usage
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
Chemical Properties
blue to dark blue-black fine crystalline powder
Uses
Different sources of media describe the Uses of 7787-35-1 differently. You can refer to the following data:
1. As pigment in fresco painting instead of Scheele's green because not so poisonous as latter. As mild oxidizing agent in organic synthesis.
2. Useful for the selective oxidation of diols.
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.]
Check Digit Verification of cas no
The CAS Registry Mumber 7787-35-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 7 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 7787-35:
(6*7)+(5*7)+(4*8)+(3*7)+(2*3)+(1*5)=141
141 % 10 = 1
So 7787-35-1 is a valid CAS Registry Number.
InChI:InChI=1/Ba.Mn.2H2O.2O.2H/h;;2*1H2;;;;/q;+2;;;;;;/p-2/rBaH2.H2MnO4/c;2-1(3,4)5/h1H2;2-3H
