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Updated: May 9, 2025
Told him he didn't need it, but he insisted." Rick said thoughtfully, "His hands seemed to be all right today. No bandages." "All he had was a plastic-tape bandage around his thumb yesterday, anyway. Guess the infection must have cleared up." "What's methyl chloride?" Rick asked. "A highly volatile chemical. It's not a painkiller in the usual sense, like aspirin.
In fact, by stronger heating we may drive off all the methyl chloride and get the original Methyl Violet back again. But we have coal-tar colours which are not basic, but rather of the nature of acid, a better term would be phenolic, or of the nature of phenol or carbolic acid. Let us see what phenol or carbolic acid is.
I tried to sell him a new analgesic ointment, but he insisted on methyl chloride. He had an old refillable prescription from some doctor over in Arlington. Said he got it because infected hangnails bother him all the time. Lucky I had some. It used to be used all the time for pain from superficial wounds, but it went out of style. He bought a whole pint. Enough to last for fifty hangnails.
One hundred cubic centimeters of the solution, when titrated with 0.1062 N hydrochloric acid, using methyl orange as an indicator, requires 38.60 cc. for complete neutralization. Barium chloride in excess is added to a second portion of 100 cc. of the solution, which is diluted to exactly 250 cc., allowed to stand and filtered.
Piperine has also been made by the uniting of piperidine and piperic acid, and, as piperidine has already been formed from pyridine, we have here a true synthesis also. Both theobromine and caffeine, its methyl derivative, have been made from xanthine, which itself can be formed from guanine, a constituent of guano.
In the following discussion of the principles underlying the behavior of the indicators as a class, methyl orange and phenolphthalein will be taken as types. It has just been pointed out that indicators are bodies of complicated structure. Chem.
That methyl orange should be most sensitive toward alkalies is evident from the following considerations: Methyl orange is a weak base and, therefore, but little dissociated. Comparison of this equation with that on page 30 will make it plain that hydrolysis is just the reverse of neutralization and must, accordingly, interfere with it.
Several organic lakes can be used for coloured lacquers, that is to say, Indian yellow, thioflavin, and auramine lake for a yellow lacquer; fuchsine, rhodamine, and chloranisidin lake for a red; diamond sky blue, and patent nileblue lake for a blue; acid green, diamond green, brilliant milling green, vert-methyl lake, etc., for a green; methyl violet, acid violet, and magenta lake for a violet; phloxine lake for a pink.
arsenious oxide Ethyl dichlor by sulphur arsine by dioxide HCl and iodine Conversion of H8chst paraformalde hyde to sym dichlor methyl ether by means The above analysis can leave us with no doubt in our minds that the organic chemical industry is the logical place for efficient chemical warfare production.
For determining the alkalimetric strength of commercial sodas, a known weight of the sample is dissolved in water, and a few drops of a solution of methyl orange are added, which colour the solution yellow or orange.
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