On oxidation with potassium permanganate it is converted into acetyl urea, together with other products.
It is formed by reducing diortho-dinitrodiphenyl with sodium amalgam and methyl alcohol, or by heating diphenylene-ortho-dihydrazine with hydrochloric acid to 150° C. It crystallizes in needles which melt at 156° C. Potassium permanganate oxidizes it to pyridazine tetracarboxylic acid.
On oxidation with chromic or nitric acids, or potassium permanganate, it yields nicotinic acid or (3-pyridine carboxylic acid, C 5 H 4 N CO 2 H; alkaline potassium ferricyanide gives nicotyrine, C10H10N2, and hydrogen peroxide oxynicotine, C10H14N20.
Chromium oxychloride reacts violently on phenol, producing hydroquinone ether, O(C 6 H 4 OH)2; chromic acid gives phenoquinone, and potassium permanganate gives paradiphenol, oxalic acid, and some salicylic acid (R.
In alkaline solution, potassium permanganate oxidizes it to inactive tartaric acid and carbon dioxide (0.
Carbon bisulphide slowly oxidizes on exposure to air, but by the action of potassium permanganate or chromic acid it is readily oxidized to carbon dioxide and sulphuric acid.
The peroxide, Ru04, is formed when a solution of potassium ruthenate is decomposed by chlorine, or by oxidizing ruthenium compounds with potassium chlorate and hydrochloric acid, or with potassium permanganate and sulphuric acid.
Klaproth in 1799, is obtained when pure carbon (graphite or charcoal) is oxidized by alkaline permanganate, or when carbon forms the positive pole in an electrolytic cell (Ber., 1883, 16, p. 1209).
Merling (Ann., 1894, 278, p. 20) showed to be converted into n-glutaric acid, [[Hooc (Ch2)3 000h]], when oxidized with potassium permanganate; according to D.
Where a solution is likely to change in composition on keeping, such as potassium permanganate, iodine, sodium hydrate, &c., it is necessary to check or re-standardize it periodically.
In the first group, we have to notice the titration of a cyanide with silver nitrate, when a milkiness shows how far the reaction has gone; the titration of iron with permanganate, when the faint pink colour shows that all the iron is oxidized.
Various substances other than potassium permanganate have been suggested for facilitating the operation; J.
Sulphur and phosphorus can sometimes be estimated by Messinger's method, in which the oxidation is effected by potassium permanganate and caustic alkali, or by potassium bichromate and hydrochloric acid.
In acid solution, potassium permanganate oxidizes it to nitric acid, but in alkaline solution only to nitrous acid.
It oxidizes a manganese salt (free from chlorine) in the presence of nitric acid to a permanganate; this is a very delicate test for manganese.
The usual test for solutions of aconitine consists in slight acidulation with acetic acid and addition of potassium permanganate, which causes the formation of a red crystalline precipitate.
0 - / CH2/ O - - CH :CH CH:CH 000H (I) - 01 1 - CH - CH:CH CH:CH CO N(CH 2) 5 (2) O Oxidation with potassium permanganate converts piperic acid into piperonal, C 8 H 6 0 3, and piperonylic acid, C 8 H 6 0 4.
On oxidation with potassium permanganate it yields acridinic acid (quinoline -a-(-dicarboxylic acid) C 9 H 5 N(COOH) 2.
Potassium permanganate in acid solution oxidizes it to carbon dioxide and water; the manganese sulphate formed has a catalytic accelerating effect on the decomposition.
Oxamic acid, HO 2 C CONH 2, is obtained on heating acid ammonium oxalate; by boiling oxamide with ammonia; and among the products produced when amino-acids are oxidized with potassium permanganate (J.
Silver nitrate or permanganate of potash.
Bleaching powder, is very good, or of a I% solution of permanganate of potash, or Condy's fluid.
Chemical methods of sterilization have also been suggested, depending on the use of iodine, chlorine, bromine, ozone, potassium permanganate, copper sulphate or chloride and ()their substances.
It melts at 55° C. and boils at 115° C. It may also be obtained by elimination of carbon dioxide from the pyrazine dicarboxylic acid formed when quinoxaline is oxidized with alkaline potassium permanganate (S.
The permanganate of potash is an irritant if used pure.
Potassium ferrocyanide may be estimated quantitatively in acid solution by oxidation to ferricyanide by potassium permanganate (in absence of other reducing agents): 5K 4 Fe(NC)s + KMnO 4 + 4H2S04= 5K 3 Fe(NC)s + 3K2S04+MnS04+4H20.
It is an unsaturated compound, and on oxidation with potassium permanganate gives succinic acid.
Sodium in amyl alcohol solution reduces it to hydroecgonidine C9H15N02, while moderate oxidation by potassium permanganate converts it into norecgonine.
Phenyl-azo-carboxylic acid, C 6 H 5 N 2 Cooh, is obtained in the form of its potassium salt when phenylsemicarbazide is oxidized with potassium permanganate in alkaline solution (J.
After protracted experimenting Sir Thomas Wardle was able in 1873 to show a series of tussurs well dyed in all the darker shades of colour, but the lighter and bright blues, pinks, scarlets, &c., he could not produce, Subsequently Tessie du Motay found that the fawn colour of natural tussur could be discharged by solution of permanganate of potash, but the oxidizing action was so rapid and violent that it destroyed the fibre itself.
Potash fusion converts it into acetic acid; nitric acid oxidizes it to acetic and oxalic acids; chromic acid mixture to acetaldehyde and acetic acid, and potassium permanganate to a0-dioxybutyric acid.
Potassium permanganate oxidizes it to fry-dioxybutyric acid.
H 3 C CO NH 3 CO CH 3 H3C C - NH - C CH3 On nitration it yields chiefly meta-nitro-benzaldehyde, crystallizing in needles which melt at 58° C. The ortho-compound may be obtained by oxidizing ortho-nitrocinnamic acid with alkaline potassium permanganate in the presence of benzene; or from ortho - nitrobenzyl chloride by condensing it with aniline, oxidizing the product so obtained to ortho-nitrobenzylidine aniline, and then hydrolysing this compound with an acid (Farben fabrik d.
Dilute nitric acid oxidizes it to acetic and oxalic acids, while potassium permanganate oxidizes it to acetone, carbon dioxide and oxalic acid.
Alkaline potassium permanganate oxidizes it to phenyl-glyoxyl-ortho-carboxylic acid, H02C C6H4 CO.
Potassium permanganate, in the presence of dilute sulphuric acid, is rapidly reduced by hydrogen peroxide, oxygen being given off, 2KM7,04+ 3H2S04+5H202= K2S04+2MnS04+8H20+502.
Potassium permanganate oxidizes it to f3-oxyisovaleric acid (CH 3) 2 C(OH) CH2.002H, whilst nitric acid gives, among other products, dinitropropane, (CH3)2C(N02)2.
Potassium bichromate and sulphuric acid oxidize it to carbon dioxide and acetic acid, while alkaline potassium permanganate oxidizes it to carbon dioxide.
Alkaline potassium permanganate oxidizes it to a-oxyisobutyric acid, (CH 3) 2.
The precipitate is dissolved in boiling water, decolorized by potassium permanganate and decomposed by barium carbonate.
Acid potassium permanganate oxidizes it to carbon dioxide and nitrogen.
Potassium permanganate oxidizes it to urea (R.
It may also be obtained by heating manganese dioxide or potassium bichromate or potassium permanganate with sulphuric acid; by the action of cobalt salts or manganese dioxide on a solution of bleaching powder (Th.
This acid is also formed by decomposing barium or lead permanganate with dilute sulphuric acid.
The green solution is readily converted into a pink one of permanganate by a large dilution with water, or by passing carbon dioxide through it: 3K2Mn04+2C02= 2K2C03+2KMn04+Mn02.
Sodium Permanganate, NaMn0 4.3H 2 O (?), may be prepared in a similar manner, or by precipitating the silver salt with sodium chloride.
Ammonium Permanganate, NH 4 Mn0 4, explodes violently on rubbing, and its aqueous solution decomposes on boiling (W.
On oxidation with potassium permanganate it gives homovanillin, vanillin, &c.; with chromic acid in acetic acid solution it is converted into carbon dioxide and acetic acid, whilst nitric acid oxidizes it to oxalic acid.