Anhydrid, acetic arsenic

Bactericides -arsenic compds as [ARSENIC COMPOUNDS] (Vol 3) -coordination compounds as [COORDINATION COMPOUNDS] (Vol 7) -in iodine production [IODINE AND IODINE COMPOUNDS] (Vol 14) -frommtro alcohols [NITRO ALCOHOLS] (Vol 17) -use of acetic anhydride [ACETIC ACID AND DERIVATIVES - ANHYDRIDE] (Vol 1)... 

The last type of arsenical containing the As—O bond to be considered is one that has received very little attention. These are derivatives like the acetates and trifluoroacetates which are obtained by reacting alkoxyarsines with acetic anhydride 337), arsenic oxides with perfluoro carboxylic acids 345), and haloarsines with silver trifluoroacetate 222). 

Hydrogen fluoride Acetic anhydride, 2-aminoethanol, ammonia, arsenic trioxide, chlorosulfonic acid, ethylenediamine, ethyleneimine, fluorine, HgO, oleum, phosphorus trioxide, propylene oxide, sodium, sulfuric acid, vinyl acetate... 

These precursors are prepared by reaction of fuming nitric acid in excess acetic anhydride at low temperatures with 2-furancarboxaldehyde [98-01-1] (furfural) or its diacetate (16) followed by treatment of an intermediate 2-acetoxy-2,5-dihydrofuran [63848-92-0] with pyridine (17). This process has been improved by the use of concentrated nitric acid (18,19), as well as catalytic amounts of phosphoms pentoxide, trichloride, and oxychloride (20), and sulfuric acid (21). Orthophosphoric acid, -toluenesulfonic acid, arsenic acid, boric acid, and stibonic acid, among others are useful additives for the nitration of furfural with acetyl nitrate. Hydrolysis of 5-nitro-2-furancarboxyaldehyde diacetate [92-55-7] with aqueous mineral acids provides the aldehyde which is suitable for use without additional purification. 

Benzene, Arsenic trichloride, Aluminum chloride. Hexanes Acetic anhydride. Nitric acid, Hexamine, Acetic acid, Methylene chloride. Sodium bicarbonate, Magnesium sulfate, Dioxane, Hydrogen chloride, Acetone, Sodium azide m-phenylenediamine, Methanol, Sodium carbonate, Ethyl chloromate, Ethylene glycol dimethyl ether, Sulfuric acid, Nitric acid... 

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. -... 

The crystals dissolve in carbon disulphide and ebullioscopic measurements indicate1 that the molecular formula is As2I4 they also dissolve in ether, alcohol and chloroform. When exposed to air, these solutions darken in colour owing to the formation of the triiodide, and the diiodide cannot be recovered bv evaporation owing to complete decomposition. Boiling acetic anhydride also dissolves the crystals but, on cooling, a yellow substance which appears to contain a derivative of the triiodide separates. The diiodide is also decomposed by pyridine with separation of arsenic, the triiodide being found in solution. 

Twenty grams of arsenic trioxide are heated in a Claisen flask with 30ml of acetic anhydride on the steam bath. When no more solid dissolves on further heating and swirling, 5ml more of the anhydride is added. This procedure is repeated until the oxide just dissolves to a clear liquid. A total of about 50ml of acid anhydride is required. The material is then fractionally distilled tn vaeux> the product comes over after the excess acetic anhydride has distilled. It forms an oily liquid which sets to a white crystalline mass in the receiver b.p. (31mm) 165-170°C. 

Anilino-553 and the three 3-tolylaminobenzo[6]thiophenes554 undergo the Bernthsen reaction when heated with an aliphatic carboxylic acid anhydride and zinc chloride 1o yield polycyclic compounds (e.g., 181 from 3-m-tolylaminobenzo[6]thiophene and acetic anhydride), They give analogous arsenic derivatives (e.g., 182 from 3-p-tolylaminobenzo[6]thiophene) when heated with arsenic trichloride in o-dichlorobenzene.553,554... 

Tetranitromethane may also be obtained by reacting nitric acid with ketene (which may be regarded as a kind of acetic anhydride), according to d Arsens and G. Levy [70],... 

NIOSH REL (Chromium(VI)) TWA 0.025 mg(Cr(VI))/mh CL 0.05/15M SAFETY PROFILE Confirmed human carcinogen. Poison by subcutaneous route. Mutation data reported. A powerful oxidizer. A powerful irritant of skin, eyes, and mucous membranes. Can cause a dermatitis, bronchoasthma, chrome holes, damage to the eyes. Dangerously reactive. Incompatible with acetic acid, acetic anhydride, tetrahydronaphthalene, acetone, alcohols, alkali metals, ammonia, arsenic, bromine penta fluoride, butyric acid, n,n-dimethylformamide, hydrogen sulfide, peroxyformic acid, phosphorus, potassium hexacyanoferrate, pyridine, selenium. 

A powerful oxidizer. Explosive reaction with acetaldehyde, acetic acid + heat, acetic anhydride + heat, benzaldehyde, benzene, benzylthylaniUne, butyraldehyde, 1,3-dimethylhexahydropyrimidone, diethyl ether, ethylacetate, isopropylacetate, methyl dioxane, pelargonic acid, pentyl acetate, phosphoms + heat, propionaldehyde, and other organic materials or solvents. Forms a friction- and heat-sensitive explosive mixture with potassium hexacyanoferrate. Ignites on contact with alcohols, acetic anhydride + tetrahydronaphthalene, acetone, butanol, chromium(II) sulfide, cyclohexanol, dimethyl formamide, ethanol, ethylene glycol, methanol, 2-propanol, pyridine. Violent reaction with acetic anhydride + 3-methylphenol (above 75°C), acetylene, bromine pentafluoride, glycerol, hexamethylphosphoramide, peroxyformic acid, selenium, sodium amide. Incandescent reaction with alkali metals (e.g., sodium, potassium), ammonia, arsenic, butyric acid (above 100°C), chlorine trifluoride, hydrogen sulfide + heat, sodium + heat, and sulfur. Incompatible with N,N-dimethylformamide. 

SAFETY PROFILE An experimental teratogen. Explodes on contact with ammonia. Ignites on contact with arsenic. Mixture with acetic anhydride is a sensitive explosive. Incompatible with alcohols. 

Explodes on contact with acetic acid, acetic anhydride, ammonium nitrate, dimethylformamide, formaldehyde, concentrated hydrochloric acid, potassium chloride + sulfuric acid, sulfuric acid + water. Forms sensitive explosive mixtures with aluminum powder + ammonium nitrate + glyceryl nitrate + nitrocellulose, ammonium perchlorate, arsenic, phosphorus, sulfur, slag wool, titanium. 

ANHYDRIDE ARSENIEUX (French) (1327-53-3) see arsenic trioxide. ANHYDRIDE ARSENIQUE (French) (1303-28-2) see arsenic pentaoxide. ANHYDRIDE CARBONIQUE (French) (124-38-9) see carbon dioxide. ANHYDRIDE CHROMIQUE (French) (1333-82-0) see chromic trioxide. ANHYDRIDE PHTALIQUE (French) (85-44-9) see phthalic anhydride. (nes)ANHYDRIDE PROPIONIQUE (French) (123-62-6) see propionic anhydride. ANHIDRIDO ACETICO (Spanish) (108-24-7) see acetic anhydride. 

CHROMIUM TRIHYDROXIDE (308-14-1) CrH204 A powerful oxidizer. Violent reaction with many materials, including reducing agents (explosion) hydrides, nitrides, and sulfides acetic acid, acetic anhydride acetone, alcohols, alkalis, alkali metals, ammonia, anthracene, arsenic, combustible materials dimethylformamide, ethers, ethyl alcohol fumes (ignition) finely divided metals hydrogen sulfide sulfuric acid organic matter peroxyformic acid, phosphorus, pyridine, selenium, sodium, sulfur, and other oxidizable materials. 

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