Sodium s. a. Disodium

The polymerization of butadiene under the influence of sodium metal to the well-known synthetic rubber Buna (in U.S.A. GRN) is understandable this way. There is first produced a small amount of disodium butadiene ... 

Ohashi and Ikeda (40) have investigated the reaction of an equimolar mixture (S/P = 1) of glassy sodium metaphosphate and disodium sulfate at a temperature higher than 800°C. The mixtures were melted in platinum crucibles at 1300° and 1400°C. for 1 hr. and rapidly cooled. The products were white crystalline substances. 

From a consideration of the above discussion it may be concluded that the main reaction of an equimolar mixture of sodium metaphosphate and disodium sulfate at a high temperature proceeds according to equation 8 and that any compound with S-O-P linkages, at least as a major component in the crystalline substances, is not formed by this reaction. A pattern of normal trisodium orthophosphate exhibits three characteristic peaks at spacings of 2.55, 2.70, and 4.25 A. The discrepancy between the spacings of the peaks due to normal trisodium orthophosphate and the unknown species discussed here remains as an unsolved problem. 

Disodium octacarbonyldiferrate(2-), Na2[Fe2(CO)s], is prepared by a procedure similar to that described above. Thus, a solution of iron pentacarbonyl (14.04 g, 72.0 mmol) in tetrahydrofuran (200 mL) is added over a 30-min period with stirring to the previously described solution of (naphthalene)sodium. Following a workup procedure equivalent to that described above, the orange precipitate that is obtained is rinsed with three 200-mL portions of pentane. Upon drying under vacuum the orange solid yields 13.6 g (99% based on iron pentacarbonyl) of bright yellow Na2[Fe2(CO)g]. The addition and removal of THF causes a reversible color change. Elapsed time for the total synthesis is hr. 

In our laboratory, this method was appUed to the purification of food mono-azo dyes. Amaranth, New Coccine, and Sunset Yellow FCF were purified at 99.7%, 99.5%, and 99.3%, respectively, from 1-23 g of commercial dyes. Continued research has led to the purification of impurities present in commercial Sunset Yellow FCF that include RS-SA (trisodium salt of 3-hydroxy-4-[sulfophenyl] azo-2,7-naphthalene disulfonic acid), GS-S A (1 -[4-sulfophenyl]azo)-2-naphthol-6,8-disulfonic acid), DONS (disodium salt of 6,6 -oxybis-2-naphthalene sulfonic acid), and 2N-SA (sodium salt of 4-[(2-hydroxy-l-naphthalenyl)azo]benzenesulfonic add). The method successfully isolated GS-SA from Sunset Yellow FCF. " ... 

Napbtboi Yellow S (citronin A, flavianic acid sodium salt, 8-bydroxy-5,7-dinitro-2-napbtbalene sulfonic acid disodium salt) [846-70-8] M 358.2, m dec on beating. Greenish yellow powder soluble in H2O. The/rce sulfonic acid can be recrystd from dil HCl (m 150") or AcOH-EtOAc (m 148-149.5"). The disodium salt is then obtained by dissolving the acid in two equivalents of aqueous NaOH... 

The mixture was refluxed for 2.75 hours and the solvent was then evaporated under reduced pressure to give a yellow oil. The oil was taken up in methanol (25 ml) and titrated to pH 10.9 with sodium hydroxide in methanol (N) using a pH meter. The precipitate was filtered off and the filtrate evaporated to a gum under reduced pressure. The gum was taken up in methanol (5 ml), filtered through filter paper and acetone (100 ml) was added to the filtrate. The precipitate was filtered off, washed with acetone and dried at 100°C/1 mm for 0,75 hour giving a pale yellow solid, prednisolone disodium phosphate (0.74 gram), which was completely soluble in water, according to U.S. Patent 2,936,313. 

A phosphate-free detergent with excellent detergency and improved foaming and rinsing properties consists of 10% sodium a-sulfo hardened beef tallow fatty acid methyl ester, 10% sodium dodecyl sulfate, 5% a-sulfomyristic acid disodium salt, 10% zeolite, 10% sodium silicate, 10% sodium carbonate, 10% cellulose, 40% Flauber s salt, and 4% water [80]. 

In recent studies, Friberg and co-workers (J, 2) showed that the 21 carbon dicarboxylic acid 5(6)-carboxyl-4-hexyl-2-cyclohexene-1-yl octanoic acid (C21-DA, see Figure 1) exhibited hydrotropic or solubilizing properties in the multicomponent system(s) sodium octanoate (decanoate)/n-octanol/C2i-DA aqueous disodium salt solutions. Hydrotropic action was observed in dilute solutions even at concentrations below the critical micelle concentration (CMC) of the alkanoate. Such action was also observed in concentrates containing pure nonionic and anionic surfactants and C21-DA salt. The function of the hydrotrope was to retard formation of a more ordered structure or mesophase (liquid crystalline phase). 

Detergency Building Performance. Detergency building performances of poly(sodium carboxylate)s were examined using a heavy duty detergent formulation on standard soiled cotton cloths. The detergency expressed as a value relative to 10 for STPP and 0 for disodium 3-oxapentanedioate(0DA) was shown below. 

Formula Gold(l) sodium thiomalate is a mixture of monosodium- and disodium-salts of gold thiomalate the respective molecular formulas being C4H4AuNa04S (monosodium salt) and C4H3AuNa204S (disodium salt) a tetrameric structure with S— Au—S linear units. 

Olsalazine sodium (Dipentum) links two 5-ASA molecules with an azo linkage. Following cleavage of the azo linkage in the colon, two 5-ASA molecules are released. Olsalazine is approved for maintenance of remission of ulcerative colitis, but a commonly reported side effect is a paradoxical increase in diarrhea. The U. S. Food and Drug Administration (FDA) has approved balsalazide disodium (Colazal) as a treatment of mild to moderately active ulcerative colitis. Balsalazide... 

Disodium methylsuccinate was made by hydrogenating a concentrated solution of itaconic acid supplied by Chas. Pfizer and Company in aqueous sodium hydroxide (pH. 8.7) over Raney nickel catalyst at 50 p.s.i. and 80-100°. After the catalyst was removed by filtration, the product was isolated by evaporation of the water and the residue was dried in a vacuum oven at 70-80°. 

The aq. soln. of trisodium phosphate reacts alkaline to methyl orange, phenol-phthaleln, and litmus and neutral to Porrier s blue. The aq. soln. of trirubidium and tricsesium phosphates also react alkaline. J. Shields, J. M. van Bemmelen, and A. Kossel found that in aq. soln., trisodium phosphate is almost completely hydrolyzed by water into disodium hydrogen phosphate and sodium hydroxide. E. Salm calculated that the degree of hydrolysis is about 23 per cent, of the sodium or 70 per cent, of theP04 E. Blanc that 34 1 per cent, of a O O A-soln. VOL. II. 3 i... 

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