Barium pentahydrate

X-ray crystallographic analysis of the sodium thiosulfate pentahydrate [10102-17-7] crystal indicates a tetrahedral stmcture for the thiosulfate ion. The S—S bond distance is 197 pm the S—O bond distance is 148 pm (5). Neutron diffraction of a barium thiosulfate monohydrate [7787-40-8] crystal confirms the tetrahedral stmcture and bond distances for the thiosulfate ion (6). 

Barium Metaborate. Three hydrates of barium metaborate, BaO 20 ate known. The tetrahydrate (147) and pentahydrate (148)... 

Calcium bis(2-amino-2,3,4-trideoxy-L-gZycero-pentarate) (calcium di-L-glutamate), tetrahydrate D-Arabinono-1,4-lactone Calcium L-arabinonate, pentahydrate Strontium L-arabinonate, pentahydrate Barium D-ribose 5-phosphate, pentahydrate 2-Deoxy-D-en/thro-pentose j8-DL-Arabinopyranose... 

Turanose Phenylosotriazole. A solution of 15 g. of turanose phenylosazone in 300 cc. of hot water was placed on the steam-bath and a solution of 22 g. of copper siilfate pentahydrate in 150 cc. of hot water was added. The mixture turned a deep cherry-red at once and in a short time (fifteen min.) a red precipitate had formed and the solution had become green. After thirty minutes from the time of addition of the copper solution, the solution was cooled, filtered, and the copper removed as sulfide. The clear light yellow filtrate was neutralized with 45 g. of barium carbonate and the insoluble material removed by filtration. The filtrate was extracted with five 50-cc. portions of ether to remove the aniline, and the aqueous portion was concentrated in vacuo to a thick sirup. The sirup was dissolved in 60 cc. of warm alcohol, filtered to remove a slight turbidity and diluted with 65 cc. of ether. Upon cooling and scratching, the product crystallized as large prisms yield 8.9 g. (72%). The phenylosotriazole was recrystallized from 10 parts of alcohol and when pure showed the melting point 193-194° and rotated [a Jj" + 74.5° in aqueous solution (c, 0.90). 

Barium Hydroxide. Exists as Anhydrous, Ba(OH)2, available commercially Monohydrate, Ba(0H)2.H20, wh powd, highly toxic, has m any industrial uses Pentahydrate, Ba(OH)2.5H2o[ translucent free-flowing wh flakes, d 651bs/cu ft, highly toxic and Octahydrate, wh crysts, mpj 78°, loses w of crystallization at 408°, d 2.18 g/cc sol in water, ale eth, highly toxic prepd by dissolving Ba oxide in w with subsequent crystallization and by other methods, used in org prepns, Ba salts in analytical chem Refs 1) CondChemDict (1971), p 92-R to 93-L 2) US Spec M1L-B-36212 (May 1964)... 

The metaborates, 1 1 x, are the most common borates of barium. BaO B203 1 H20 precipitates from a boiling solution of barium chloride and boric acid treated with sodium hydroxide to a pH of over 11.4 (260) it dehydrates completely at 300°C. The 1 1 4, 1 1 5, and 1 1 6 metaborates have the formula Ba[B(OH)J2 xH20 (Table I). The tetrahydrate is stable at 30°C in the Ba0-B203-H20 system (202) and can be separated from sodium borate/barium chloride solutions at pH 11 at a higher pH and in dilute solution, the pentahydrate crystallizes out. 

Levy5 has shown that two isomeric varieties of the pentahydrate exist, analogous to the two isomerides of the tetrahydrate of barium platinocyanide. The a-salt may be described as golden yellow with green fluorescence on the pyramid faces, whilst the (3-salt shows a green fluorescence on all faces, which is particularly intense on the tops of the crystals. The crystalline characters of the two isomerides are identical. 

Barium Hydroxide. Exists as Anhydrous, Ba(OH)2, available commercially Monohydrate, Ba(0H)2.H20, wh powd, highly toxic, has mlany industrial uses Pentahydrate, Ba(OH)2.5H2o[ translucent free-flowing wh flakes, d 651bs/cu ft, highly toxic and Octahydrate, wh crysts, mp ... 

One hundred grams of pure mannonic phenylhydrazide, 80 g. of copper sulfate pentahydrate, one liter of water and 1 cc. of octyl alcohol (to control foaming) were boiled for five hours under reflux. The solution was cleared of copper as sulfide, of sulfuric acid as barium sulfate, and upon concentration to 75 cc. the lactone crystallized readily. Successive crops were obtained by concentration and treatment of the sirups with methyl alcohol. The total yield of pure lactone was 55.8 g. (90%). During the reaction there is a vigorous evolution of nitrogen and in the condenser droplets of benzene appear. 

CgHsOsP - Ba + S HjO Barium D-ribose 5-phosphate, pentahydrate BARIBP 31 363... 

In accordance with the former reaction, Cu(N3)2 Cu(OH)2 may be prepared when a distilling flask with gas inlet tube is charged with 100 ml water and 1 g copper(II) azide. The receiver contains 50 ml water to which is added 67 ml of a 0.1 N barium hydroxide, and phenolphthalein as an indicator. At 70-80°C a stream of air is bubbled through, carrying hydrazoic acid vapors into the receiver. The operation is interrupted at the turn of the indicator (3-5 hr) [176]. The compound is also obtained in accordance with the second reaction from a solution of 2.6 g sodium azide in 100 ml water, to which is added a mixture of 10 g copper sulfate pentahydrate in 150 ml water and 1.6 g sodium hydroxide in 150 ml water [179]. 

Acetone Ammonium hydroxide Barium Cupric sulfate anhydrous Cupric sulfate pentahydrate... 

According to Bagal [2], the sodium salt forms a pentahydrate at room temperature that loses two molecules of crystalline water above 30 °C and forms an anhydride salt above 75 °C. Contrary to other authors, Reddy and Chatterjee [90] have reported the formation of a monohydrate for the sodium and barium salts (on the basis of TGA results). Lead and mercury salts form as anhydrides [90]. 

C5H18CaCl209, a-L-Arabinose calcium chloride tetrahydrate, 44B, 389 CsHi9BaOi3P, Barium ribose-5-phosphate pentahydrate, 27, 792 CsHyNaOs, Sodium ascorbate, 34B, 247 CgHyOgTl, Thallium(I) L-ascorbate, 39B, 298... 

Reactions in which the number of growth nuclei formed in a given time have been observed experimentally are rather few in number, and for many decompositions the law of nucleus formation has been inferred from the kinetics rather than determined by direct observation. Notable exceptions are barium azide( ) oz t nickel sulphate heptahydrate( ) oc and copper sulphate pentahydrate and chrome alum( ) oc /. 

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