Alizarine sulfonate

Alizarin S, alizarin carmine, sodium alizarin sulfonate (indicator) dissolve 0.1 g in 100 mL water pH range yellow 3.7-5.2 violet. 

Picric acid is a strong acid it decomposes carbonates and may be titrated with bases by the use of sodium alizarine sulfonate as an indicator. It is a fast yellow dye for silk and wool. It attacks the common metals, except aluminum and tin, and produces dangerously explosive salts. Cordeau Lkeure, which was long<... 

Water as the solvent. Water may be used to dissolve tropeolin 00, methyl orange, p-nitrophenol, sodium alizarine sulfonate, propyl-a-naphthol orange, nile blue, alizarine yellow, diazo violet, and tropeolin 0. 

Sodium alizarine sulfonate Sodium 1,2-dihydroxyanthraquinone sulfonate 5.5-6.8 yellow - red Sorensen... 

It is better to use the water soluble sodium salt of alizarine sulfonic acid,... 

Sodium alizarine sulfonate. The interval in water is in the range 3.7-5.2 (yellow to violet). The indicator has a brown color in a 99.7% alcohol solution. In the presence of alkali, the color is red-brown instead of violet as in water. 

Bromcresol green Methyl red Sodium alizarine sulfonate... 

Salt Correction of Sodium Alizarine Sulfonate, Bromchlorphenol Blub, Bromphenol Blue, Bromcresol Green, and a-DiNiTROPHENOL. Measured in Sodium-Potassium Citrate Mixtures (Compared WITH the Buffer Solutions of Clark)... 

Intorre and Martell (237) have also studied the formation of mixed chelate species in which the zirconium 1 1 complex with the hexa-dentate chelating ligands, ethylenediaminetetraacetic acid, iV-hydroxy-ethylethylenediaminetriacetic acid, and m7 s-cyclohexanediaminetetra-acetic acid, are shown to take up one mole of the bidentate ligands, l,2-dihydroxybenzene-3,5-disulfonate l,8-dihydroxynaphthalene-3,6-disulfonate 8-hydroxyquinoline-5-sulfonate, and acetylacetone (except ZrHEDTA), to form 8-coordinate 1 1 1 species. At least for the zir-conium-EDTA-l,2-dihydroxybenzene-3,5-disulfonate species, there is evidence for dimerization (230). Additionally, the Zr EDTA complex reacts with one mole of the bidentate ligands, 5-sulfosalicyclic acid, alizarin sulfonate, citric acid, and lactic acid to form 1 1 1 complexes tartaric acid and pyrophosphate ions form complexes which could not be identified. The zirconium-nitriloacetic acid complex in the presence of two moles of oxalic acid or l,2-dihydroxybenzene-3,5-sulfonate also forms 1 1 1 complexes in solution. 

There are several methods available to determine the amount of carbon-bonded fluorine. One of the earlier methods employed the Schoniger Combustion technique followed by thorium nitrate or cerous chloride titration using sodium alizarin sulfonate or murexide as the indicator (21). 

Quantitative determination of the halogens can be accomplished by a number of procedures. Accurate analysis of fluorine is the most difficult, and is generally carried out either by (1) calcium fluoride precipitation, (2) lead chlo-rofluoride precipitation, or (3) titration with thorium nitrate using sodium alizarin sulfonate as an indicator Th(N03)4(aq) - - 4KF(aq) ThF4(s) - - 4KN03(aq). 

The addition of alizarin or alizarin sulfonate to dilute solutions of zirconium chloride containing hydrochloric acid results in a red-violet color due to the formation of hydrosols of a zirconium lake with these dyestuffs (see page 518). The dispersions turn yellow as soon as they are treated with excess fluoride. The zirconium combines with the latter to form colorless complex [ZrFanions and is withdrawn from the alizarin lake. Consequently, only the yellow color of the alizarin remains. 

Reagent 0.05 g zirconium nitrate is dissolved in 60 ml water and 10 ml concentrated hydrochloric acid. The solution is mixed with a solution of 0.05 g sodium alizarin sulfonate in 50 ml water. 

Reagents 1) Sodium alizarin sulfonate 0.2 g dissolved in 100 ml water and 0.5 ml acetic acid added... 

Zirconium salts, in not too strong acid solution, give a red to dark violet precipitate on the addition of an alcoholic solution of alizarin or an aqueous solution of alizarin sulfonic acid. Other polyhydroxyanthraquinones behave similarly. The precipitation is accelerated by warming. 

Analysis. Krypton and fluorine, subjected to an electric discharge at about 90 K and 30 torr, react to form a white solid. The solid hydrolyzes with the formation of HF and Kr 0.0380 mg of Kr is recovered, and the titration of the fluoride in solution (with thorium nitrate alizarin sulfonate is used as the indicator) shows the presence of 9.10 X 10 mmole F . What is the empirical formula of the krypton fluoride ... 

Alizarin and Alizarin Red S (sodium alizarin sulfonate). Uranium Is precipitated slowly by the reagents when the uranyl Ion concentration Is less than 20 mlcrograms per milliliter.. ... 

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