Chloride Alizarin

Hydroxylamine/ferric chloride Alizarin (0.1% in ethanol) Chlorine/pyrazolinon/cyanide... 

The calcium lake of 1,2-dihydroxyanthraquinone is marketed as Pigment Red 83, 58000 1. It is produced commercially by treating a slightly basic alizarin solution with aqueous calcium chloride. 

Alizarin Red S (sodium salt, H2O) [130-22-3] M 360.3. Commercial samples contain large amounts of sodium and potassium chlorides and sulphates. It is purified by passing through a Sephadex G-10 column, followed by elution with water, then 50% aq EtOH [King and Pruden Analyst 93 601 7968]. 

Alizarin, 981 Alkyd resins, 1018 Alkyl borates, 302 Alkyl bromides, 270 Alkyl chlorides, 270 Alkyl fluorides, 272 Alkyl halides, 270... 

Alaninols, a271, a272 Alizarin, d371 Allylacetic acid, p50 Allylacetone, h78 4-Allylanisole, a94 Allyl carbamide, a 105 Allyl chloride, c216... 

Reagent Solution Disperse 124.5 mg of alizarin violet 3R in 500 mL of water contained in a 1-L volumetric flask. Mechanically stir overnight. Add 20 mg of sodium hexameta-phosphate, 48.5 g of ammonium chloride, and 6.2 mL of ammonium hydroxide (equivalent to 1.6 g of NH3). Dilute to volume with water, and stir overnight. A 10-fold aqueous dilution of this solution in a 1-cm cell has an absorbance of... 

Mix together on a spot plate 2 drops each (equal volumes) of a 0-1 per cent aqueous solution of alizarin-S (sodium alizarin sulphonate) and zirconyl chloride solution (0-1 g solid zirconyl chloride dissolved in 20 ml concentrated hydrochloric acid and diluted to 100 ml with water) upon the addition of a drop or two of the fluoride solution the zirconium lake is decolourized to a clear yellow solution. 

Alternatively, mix 2 drops each of the alizarin-S and zirconyl chloride solutions in a semimicro test-tube, add a drop of dilute hydrochloric acid or of 1 1 (v/v) acetic acid, followed by 2 drops of the test solution. The pink colour will change to yellow. 

Group IIIB. Ni, Co, Mn, and Zn The metals are present as chlorides in dilute hydrochloric acid. The solvent used is acetone containing 5 per cent (v/v) water and 8 per cent (v/v) hydrochloric acid (d 1.18). The separation is conducted in an atmosphere saturated with respect to the solvent. The strip is dried (after a solvent movement of about 25 cm), exposed to ammonia vapour, and then sprayed with a saturated alcoholic solution of alizarin containing 0-1 per cent rubeanic acid and 1 per cent salicyladoxime. The following results are obtained (cf. also Fig. VI.5b). 

Scandium, thorium and the rare earths The metals are present as nitrates in dilute nitric acid solution. The solvent is 2-methyltetrahydroxyfuran (tetrahydrosylvan) containing 5 per cent (v/v) water and 10 per cent (v/v) nitric acid (d. 1 42). The mixture is spotted upon paper and dried thoroughly in the air. The relative humidity inside the extraction vessel is maintained at 80 per cent by means of a saturated solution of ammonium chloride. After the solvent has diffused about 15 cm down the solvent strip, it is allowed to evaporate, and the strip is placed for about 10 minutes in an atmosphere of ammonia vapour. The paper chromatogram is then sprayed with an alcoholic solution of alizarin and finally with 2m acetic acid. The following results are obtained. 

Materials. The wool fabric was a plain-weave worsted wool, style 6561, from Burlington Industries. The silk fabric was a degummed silk crepe, style 601, from Testfabrics, Inc. The dyes were >95% pure and were from the following sources alizarin (C. I. Mordant Red 8) from Aldrich Chemical Co. brazilin (C. I. Natural Red 24) from J. T. Baker Chemical Co. and carminic acid (C. I. Natural Red 4) from H. Kohnstamm Co., Inc. The five reagent grade metal salts used were aluminum potassium sulfate, stannous chloride, cupric sulfate, ferrous sulfate, and potassium dichromate from J. T. Baker Chemical Co. 

Mordant 1/2-in. strips of test cloth in the following mordants, which are 0.1 M solutions of the indicated salts. Immerse pieces of cloth in the solutions, which are kept near the boiling point, for about 15 to 20 min or longer. The mordants are ferrous sulfate, stannous chloride, potassium dichromate, copper sulfate, and potassium aluminum sulfate (alum). The alum and dichromate solutions should also contain 0.05 M oxalic acid. These mordanted pieces of cloth can then be dyed with alizarin (1,2-dihy-droxyanthraquinone) and either Methyl Orange or Orange II in the usual way. 

This compound is a trioxyacetophenone (OH)3C6H3COCHg, obtained by heating pyrogallol with acetic acid and zinc chloride to 150°. It may be used for printing with chromium acetate, and gives brown shades [23]. It is named Alizarin Yellow G. 

Alizarin Red S (3,4-dihydroxy-9,10-dioxo-2-anthracene sulfonic acid, Na salt. H2O) [130-22-3] M 360.4, pKj <1, pK 5.49, pK 10.85 (11.01). Commercial samples contain large amounts of sodium and potassium chlorides and sulfates. It is purified by passing through a Sephadex G-10 column (size exclusion column), followed by elution with water, then 50% aqueous EtOH [King Pmden Analyst (London) 93 601 1968]. Finally dissolve it in EtOH and precipitate it with Et20 several times [Sacconi J Phys Chem 54 829 1950, polarography Fumam Stone J Am Chem Soc 70 3055 1948, Beilstein 11 IV 682.]... 

In the heating process, which leads to the formation of the absorption bands at longer wavelengths, hydrogen fluoride or hydrogen chloride is evolved and the alizarin is not desorbed. Thus the alizarin on the surface, after heating, is not in a physically adsorbed state but rather is tightly... 

Once in solution, the preferred method for measurement of boron is inductively coupled plasma atomic emission spectroscopy (ICP-AES) or inductively coupled plasma mass spectrometry (ICP-MS). The most widely used nonspectrophotometric method for analysis of boron is probably ICP-MS because it uses a small volume of sample, is fast, and can detect boron concentrations down to 0.15 pgL . When expensive ICP equipment is not available, colorimetric or spectrophotometric methods can be used. However, these methods are often subject to interference (e.g., nitrate, chloride, fluoride), and thus must be used with caution. Azomethine-H has been used to determine boron in environmental samples (Lopez et al. 1993), especially water samples. Another simple, sensitive spectrophotometric method uses Alizarin Red S (Garcia-Campana et al. 1992). 

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). 

Okabayashi et al.[29] rep)orted on a dual preconcentration column system for the determination of low concentrations of fluoride using a fluoride electrode. 1 ml of sample was sorbed selectively on an anion-exchanger loaded with alizarin fluorine blue sulphonate-lanthanum complex. The columns were loaded alternately, and successively eluted with IM sodium chloride - O.S M sodium chloride. A detection limit of 1 /xg r was achieved at a sampling frequency of 24 h ... 

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