Thallous nitrate

The metal dissolves in nitric and sulfuric acid. The solution on evaporation crystallizes to yield thallous nitrate and sulfate. Reaction with hydrochloric acid is very slow. 

Thallous sulfate, thallous nitrate, and thallous and thallic oxide are the main compounds produced in bulk quantities by Noah Chemical. Approximately 20 other thallium compounds are also available commercially from Noah Chemical, Cooper Chemical, and Alfa Products, Ventron Division, Thiokol Corporation, in research and production quantities. However, demand for thallium compounds is small and limited to such applications as synthetic or analytical reagents. 

Thallic oxide can be prepared by reaction of thallium with oxygen or hydrogen peroxide and an alkaline thallium(I) solution. However, it is more easily made from the oxidation of thallous nitrate by chlorine in aqueous potassium hydroxide solution. It is insoluble in water but dissolves in carboxylic acids to give carboxylates. 

Nitrates. Thallous nitrate, a convenient source of other thallium(I) derivatives, eg, halides, is prepared from the reaction of the pure metal with dilute nitric acid (9). The solid is stable to 300°C and decomposes at 800°C to Tl O, NO, and N02. Thallic nitrate is obtained as a trihydrate upon dissolving T Oj in cold nitric acid. It decomposes to T C on heating to 100°C or upon hydrolysis. Thallic nitrate, soluble in alcohols and ethers of polyethylene glycols, is often used as an oxidizing agent in oiganic syntheses. 

Thallous nitrate [10102-45-1] M 266.4. Crystd from warm water (Iml/g) by cooling to 0°. 

G. Canneri found that the treatment of a suspension of thallium sesquioxide in water with liquid nitrous anhydride, and subsequent evaporation of the soln., even in the cold under reduced press., yields, not thallic nitrite, but thallous nitrate. The latter is also obtained when soln. of thallic sulphate and barium nitrite are mixed in the cold, and the resulting liquid evaporated at low temp. That thallic nitrite is capable of existence in soln., although it cannot be obtained in the solid condition, is shown by the analyses and properties of the soln. The treatment of an aq. soln. of thallic nitrite with alcohol yields a precipitate of the sequioxide. In ethereal soln., thallic nitrite is far more stable, and the salt separates in the solid state on evaporation of the solvent it could not, however, be analyzed directly. Decomposition of thallic nitrite, with formation of thallous nitrate, takes place solely in accordance with the equation T1 (N02)3->TlN03+N2Os, neither intermediate reduction products nor thallous-thallic complex compounds being formed. 

Tris (Thionitrosyl) Thallium. (SN)3T1, N3S3T1 mw 342.58 unstable solid. Decompd by hot w into X12S03 and ammonia. Prepn is by reacting tetrasulfur tetranitride in liq ammonia with thallous nitrate to yield T1(NS)3.HNH3, which in vacuo at 48° yields the desired compd. The thionitrosy compd explds with great ease when either shocked or heated Refs 1) Gmelin, not found 2) K. Wade ... 

Motions of molecules in condensed systems. VII. The infrared spectra for single crystals of ammonium nitrate and thallous nitrate in polarized radiation. J. chem. Phys. 18, 1276—1290 (1950). 

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The following atomic absorption spectrophoto-metric method is applicable to blood and urine, and uses a conventional air-acetylene flame atomiser. Standard Thalliim Solutions. Dissolve 1.3034g of thallous nitrate (TINO3) in sufficient water to produce 1000 ml. This solution contains 1 mg ofTl in 1 ml. Serially dilute the solution with water to produce solutions containing 0.2, 0.5, 1.0, 2.0, and 4.0 p,g of T1 in 1 ml. 

SYNS NITRIC ACID,THALLIUM(1+) SALT RCRA WASTE NUMBER U217 D THALLIUM MONONITRATE THALLOUS NITRATE... 

Thallium Uranyl Carbonate, Tl4U02(C03)3, separates as a crystalline precipitate on the addition of thallous nitrate to a solution containing uranium in presence of a carbonate. It is extremely insoluble in water, and the crystals, which are characteristic, maj serve for the mierochemical detection of uranium. 

Mixtures of thallous nitrate with silver, mercurous, and mercuric nitrates have low melting points and densities ranging from 4.8 to 5.3. Such mixtures are useful for separating minerals of different densities. 

Thallous nitrate reacts with (XXXII) in the same way as lead iodide and nitrate. Red-brown 2T1(NS)3 NH3 may be precipitated from ammonia solution and may be converted to red-brown T1(NS)3 (54). Ochre colored T13(NS)8 is precipitated from alcoholic solution. With copper(I) chloride, brown Cu(NS)2 is precipitated, while with silver nitrate red-brown Ag(NS)2 is obtained (54). The structures of these metallic derivatives are not yet established. 

A colorless 5% solution of thallous nitrate or sulfate in caustic alkali is a good reagent for soluble oxidizing anions that are effective in an alkaline milieu. Pertinent compounds give a chocolate-brown precipitate or coloration produced by the reaction ... 

Procedure. A small amount of the solid (fractions of a mg are enough) is digested warm with several drops of 2 iV ammonium hydroxide and then centrifuged. One drop of the centrifugate is placed on a spot plate and treated in succession with a drop of 3 % hydrogen peroxide solution and a drop of a 5 % solution of thallous nitrate in 2 iV ammonium hydroxide. An immediate brown color or precipitate indicates the presence of M0O3, WO3 or VgOg. 

A drop of the test solution is placed on filter paper and exposed briefly to the fumes of concentrated hydrochloric acid. The fleck is then spotted with dilute thallous nitrate solution. Yellow thallous iodide is formed. ... 

To detect free alkali in the presence of alkali sulfides, which also give an alkaline reaction owing to hydrolysis, use is made of the fact that thallous sulfide is insoluble whereas thallous hydroxide is soluble in water and is almost as strong a base as potassium hydroxide. Free alkali may be detected by adding neutral thallous nitrate and then testing the solution for an alkaline reaction. 

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