543-80-6 barium acetate

In metallic form, barium is very reactive, reacting readily with water to release hydrogen. In aqueous solution it is present as an ion with a +2 charge. Barium acetate, chloride, hydroxide, and nitrate are water-soluble, whereas barium arsenate, chromate, duoride, oxalate, and sulfate are not. Most water-insoluble barium salts dissolve in dilute acids barium sulfate, however, requkes strong sulfuric acid. 

Barium acetate [543-80-6] Ba(C2H202)2, crystallines from an aqueous solution of acetic acid and barium carbonate or barium hydroxide. The level of hydration depends on crystallization temperature. At <24.7°C the trihydrate, density 2.02 g/mL is formed from 24.7 to 41 °C barium acetate monohydrate [5908-64-5] density 2.19 g/mL precipitates and above 41 °C the anhydrous salt, density 2.47 g/mL results. The monohydrate becomes anhydrous at 110°C. At 20°C, 76 g of the monohydrate dissolves in 100 g of water. Barium acetate is used in printing fabrics, lubricating grease, and as a catalyst for organic reactions. 

Barium acetate [543-80-6] M 255.4. Crystd twice from anhydrous acetic acid and dried under vacuum for 24h at 100°. 

Workup (b) To the mixture arc added 5.6 g (22 mmol) of barium acetate. After chilling for 1 h, the precipitated inorganic phosphate is removed by centrifugation. The supernatant is adjusted to pH 7.5 and diluted with ethanol (1 L). After standing at O C overnight, the precipitated barium salt of the product is collected by centrifugation, washed with ethanol and diethyl ether, then dried under high vacuum yield 7.3 g (92%). 

Barium acetate decomposes [1050] with growth of planar product nuclei, E = 167 kJ mole-1 (720—750 K). Reactions of other Group II acetates are reported [1051] as being accompanied by at least partial melting. 

Fig. 4. — (a) Gel-Filtration (G. F.) and (b) Electrophoretic (E. P.) Patterns of a Typical, Pig-mucosal Heparin. [Shoulders on the gel-filtration curve (Sephadex G-75, column 180 X 1 cm, 10% Na acetate + 10% EtOH) and bands in the electrophoretograms (cellulose acetate, low amperage, 0.1 Af barium acetate) indicate heparin species differing from each other as regards both mean mol. wt. and degree of sulfation (d.s.). The dashed curve is the electrophoretogram of the fraction of lowest mol. wt. (separated by gel-filtration), accounting for 10% of the total heparin.44]... 

Barium acetate, Yttrium oxide See Barium acetate Copper(II) oxide, etc. 

Metal carboxvlates M(OOCR)x Ba(OOCCH3)2, Barium acetate tri-hydrate... 

A better method has been described by Schwarz (S6). Washed red blood cells are lysed, precipitated with trichloroacetic acid below 0°C and the supernatant quickly neutralized. Speed and low temperatures are necessary to prevent hydrolysis of galactose-l-phosphate which is very sensitive to acid. Barium acetate and ethanol are added, and the precipitated barium salt of galactose-l-phosphate washed with 80% ethanol. The barium salt is then hydrolyzed by heating with dilute hydrochloric acid, acid and salts removed with mixed ion-exchange resins, and the galactose estimated by paper chromatography as described above. It is probably better to avoid the Amberlite MB-1 resin used by Schwarz and, instead, to use a weak base resin mixture, such as Amberlite MB-4. Recovery of added galactose-l-phosphate should be determined simultaneously. 

Barium(II), concentration formation constant of chelates, 5 717t Barium 2-ethylhexanoate, 3 362 Barium acetate, 3 355 Barium acetate monohydrate, 3 355 Barium alloys, 3 344 Barium-aluminum evaporation getters, 3 349... 

Barium acetate [Ba(CjHj02)2 H20], a white crystal, is used as a dryer for paints and varnishes. It is produced by adding acetic acid to barium sulfate and recovering the crystals by evaporation. It is also used as a textile mordant and catalyst. 

Compounds Soluble—barium nitrate, barium sulfide, barium chloride, barium hydroxide, barium acetate insoluble—barium sulfate... 

Barium acetate reagent, 0.5 M, pH 7.0 - dissolve 127.7 g barium acetate [Ba(CH3COO)2l in water and make up to 1 I. Adjust to pH 7.0 using acetic acid and/or barium hydroxide solution as appropriate. 

Barium acetate is used as a mordant for printing textile fabrics for drying paints and varnishes in lubricating oil in the preparation of other acetates and as a catalyst in organic synthesis. 

Barium acetate is made by the reaction of barium carbonate with acetic acid ... 

The solution is concentrated and the anhydrous barium acetate crystallizes at a temperature above 41°C. At temperatures between 25 to 40°C, barium acetate monohydrate, Ba(C2H302)2 H2O [5908-64—5] (density 2.19 g/cm ) crystallizes out of solution. 

Barium acetate also may be prepared by treating barium sulfide with acetic acid, followed by slow evaporation and subsequent crystallization of the salt from the solution ... 

Barium acetate converts to barium carbonate when heated in air at elevated temperatures. Reaction with sulfuric acid gives harium sulfate with hydrochloric acid and nitric acid, the chloride and nitrate salts are obtained after evaporation of the solutions. It undergoes double decomposition reactions with salts of several metals. For example, it forms ferrous acetate when treated with ferrous sulfate solution and mercurous acetate when mixed with mercurous nitrate solution acidified with nitric acid. It reacts with oxahc acid forming barium oxalate. 

Eluent was comprised 12 mM NaOH with 1 mM barium acetate. Flow rate was 1 mL/ min. 

In a different patent, metal compound catalysts made of a mixture of calcium and barium acetates (3 1 by weight) were used in the transesterification of oils and fats with high FFA content without a pre-esterification step. Again, high temperatures were required (>200°C) and the oil as well as the alcohol had to be anhydrous. 

GAGs are separated by electrophoresis to yield a distinct pattern for the different MPS types [32, 33]. It was found that electrophoresis in barium acetate depends largely on the structure of the GAGs, whereas the degree of sulfatation is of minor importance [69]. One-dimensional electrophoresis, as described here, offers lower resolution than two-dimensional techniques [28], but is simpler to evaluate and allows the assessment of several patients in one run. 

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