Anhydride, Arsenious

Arsenic Trtoxide (Arsenous Acid, Arsenous Acid Anhydride, Arsenious Oxide, Arsenic Sesqui-oxide, White Arsenic). As203, mw 197.82 ... [Pg.448]

Arsenic trioxid—Arsenious anhydrid—Arsenious oxid—White arsenic—Arsenic—Arsenious acid—Acidnm arseniosum, TJ. S. j Br.— AsiOs—198. [Pg.123]

Cm ORINE OXYGEN ACIDS AND SALTS - Cm ORIC ACID AND Cm ORATES] (Vol 5) Arsenious acid anhydride... [Pg.72]

The demand for metallic arsenic is limited and thus arsenic is usually marketed in the form of the trioxide, referred to as white arsenic, arsenious oxide, arsenious acid anhydride, and also by the generally accepted misnomer arsenic. [Pg.327]

Synonyms arsenic oxide arsenic sesquioxide white arsenic arsenic (III) oxide arsenious acid anhydride... [Pg.71]

JPreparation.—By reducing, with chorcoal, arsenious anhydride, which is produced in the roasting of many ores —... [Pg.120]

Reaeiiotto.—1. When burnt with free access of air, it gives water and arsenious anhydride ... [Pg.120]

By distilling sodic chloride, arsenious anhydride, and sulphuric acid —... [Pg.121]

Prepara on.—By treating arsenious anhydride with nitric acid —... [Pg.123]

Pr aration.— y passing sulphuretted hydrogen through a solution of arsenious anhydride in hydrochloric acid ,— 2AsCl, + 3SH, a 6HC1 + A ,S",. [Pg.124]

By the distillation of potassio acetate with arsenious anhydride, a compound known as cacodyl, As",Me, is produced. This substance may also be prepared by the action of methylie iodide upon an alloy of soffium and arsenic containing A8, Na. -... [Pg.371]

Arsenious sulphide reacts with metallic sulphides as an acid thio-anhydride and forms a series of complex salts known as thioarsenites. These may be considered to be derived from the following hypothetical acids 9... [Pg.251]

Determination of the Arsenic.—This is carried out with Schwein-furt green, which may contain it, besides as copper arsenite, also partly as free arsenious anhydride, this being recognisable under the microscope by its octahedral form. [Pg.394]

For the determination, about 0-3 gram of the finely-powdered substance is treated in a beaker with 25 c.c. of water, concentrated hydrochloric add being then added drop by drop until the pigment is dissolved as a rule not more than 10 drops are required. If free arsenious anhydride is present in appreciable amount, it remains undissolved under these conditions and may be filtered off and washed. The filtrate is treated with sodium carbonate to indpient precipitation and then with a solution of 2-3 grams of sodium potassium tartrate it is next diluted to about 200 c.c., mixed with about 5 grams of solid sodium bicarbonate and titrated with iodine solution in presence of starch paste in this way the combined arsenious anhydride is determined. [Pg.394]

The free arsenious anhydride remaining on the filter is washed with water into a beaker and dissolved by boiling with sodium bicarbonate, the liquid being then titrated with iodine. [Pg.394]

Schwevnfurt green of normal composition should contain 31-4% of CuO and 58-5% of As20, commercial pure products usually contain 27-31% of CuO and 50-58% of combined As203. Free arsenious anhydride should not exceed x—2%, but in certain qualities it may be as much as or even more than 5%. [Pg.394]

SYNS ACIDE ARSENIEUX ANHYDRIDE ARSENIEUX ARSENIC BLANC ARSENIC OXIDE ARSENIC(III) OXIDE ARSENIC SESQUIOXIDE ARSENICUM ALBUM ARSENIGEN SAURE ARSENIOUS ACID ARSENIOUS OXIDE ARSENIOUS TRIOXIDE ARSENITE ARSENOUTE... [Pg.109]

Chloromercurithiophene or mercury 2 2 -dithienyl is treated with arsenious chloride and the product warmed on the water-bath. The filtrate from this mixture is treated with aqueous sodium hydroxide, then with hydrogen peroxide. Addition of barium chloride then helps to remove any inorganic arsenic which has not crystallised out as sodium arsenate. The whole is filtered, the filtrate freed from barium and sulphuric acid and evaporated down after the addition of concentrated hydrochloric acid. The residue is dissolved in alcohol, boiled with charcoal, and treated with sodium hydroxide. The sodium salt of the arsinic acid crystallises out in transparent, colourless, non-deliquescent, rhombic plates, which are very soluble in water. The free acid forms tufts of needles, M.pt. 185 5° C., fairly soluble in water or alcohol. At 106° to 108° C. it is converted into the corresponding anhydride. Sulphurous acid in the presence of a trace of hydriodic acid reduces it to thienyl-2-arsenoxide, whilst with sodium hydrosulphite it yields 2 2 -arsenothiophe-ne,... [Pg.413]

Synonyms.—Arsenious Anhydride White Arsenic. Composition.— A 203. [Pg.7]

Ckimposition.—By some authorities it is regarded as arsenious anhydride dissolved in a solution of potassium carbonate by others as an aqueous solution of potassium... [Pg.139]

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