Benzene arsonic acid

They are still used in the treatment of other parasitic infections. Thus, derivatives of benzene arsonic acid, CsHsAsOfOH, such asiV-acetyl-4-hydroxy-m-arsanilic acid, Af-carbamoylarsanilic acid and its oxide, sodium -(carbamoyl-methyl) arsanilate and glycobiarsol (18) are potent intestinal amoebicides when taken orally, and difetarsone (19) has recently found use as an anthelminthic29. They are also administered in the treatment of trypanosomiasis and helminthiasis in animals, as well as in topical application to destroy Trichomonas vaginalis and moni-linia. For the first of these purposes they have been largely replaced by melarsoprol... 

Dinitro 4 aminD pheny arsonic Acid or 2,6 Dinitro 1 amino 4 benzene arsonic Acid,... 

P. Karsten, H. L. Kies, and J. J. Walraven "Turbidimetric Determination of Tin (IV) with 3-Nitro-4-Hydroxy-Benzene-Arsonic Acid" ... 

Thorin indicator solution 0.02% aqueous Thorin (sodium salt of 2(2-hydro-3,6-disulfo-l-napthylazo) benzene arsonic acid). 

In general, primary aromatic amines can be converted into the corresponding arsonic acids by the Bart reaction or by one of its modifications. This method has been used to prepare arsonic acids of the benzene, naphthalene, fluorene, and anthraquinone series as well as of a number... 

The very stable spirocyclic compounds of types XXII and XXIII have been known for a long time (10,54, 60,161). These have been prepared by allowing 1 mol of the appropriate arsonic acid to react with 2 mol of the 1,2-dihydroxy compound, the water formed being removed either by performing the reaction in acetic anhydride or by azeotropic distillation from a suitable solvent, e.g., benzene (161). 

Finally, both arsonic and arsinic acids can be esterified direcdy using the appropriate alcohol by removal of the water formed in the esterification. Azeotropic distillation using benzene or toluene is generally used for this purpose. On heating slowly, arsonic acids form anhydrides, (RAs02)w. 

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