Chromazurol

Chromazurol S [1667-99-8] M 605.3. Purified by paper chromatography using zi-butanol, acetic acid and water (7 3 1). First and second spots extracted. 

Chromazurol S [1667-99-8] M 539.3, A,max 540nm, e 7.80 x 104 (10M HC1). Crude material (40g) is dissolved in water (250ml) and filtered. Then added cone HC1 (50ml) to filtrate, with stirring. Ppte is filtered off, washed with HC1 (2M) and dried. Redissolved in water (250ml) and pptn repeated twice more in water bath at 70°. Then dried under vacuum over solid KOH (first) then P2O5 [Martynov et al. Zh Analit Khim 32 519 1977). 

In addition to the above method, based on the use of pyrocatechol violet, Tecator also describes a flow injection analysis for determining 0.5-0.5mg/l aluminium in soil extracts based on the measurement of the chromazurol-aluminium complex at 570 nm [4,5]. 

Copper PAN CV 8-10 mg CaC03/g product Chromazurol-S CV 30-33 mg CaC03/g product Calcium Oxalate 0 mg CaC03/g product Iron Chelation >100 ml 0.1M FeC13... 

Chromazurol S complexes have been used in the spectrophotometric determination of aluminium. 

Hydrophilic acid ethanol-soluble Chromazurol S pA, 5.28 4.90 7.8 HAc-NaAc... 

Spectrophotometric determination using chromazurol S General remarks... 

In the presence of pyridinium chloride, beryllium ions form with chromazurol S at pH 6.0 a metal chelate complex which after 13 min. remains stable for at least 3 hours. The absorption maximum of this complex at 373 nm is suitable for photometric determination of beryllium. The molar ratio of beryllium to chromazurol S is 1 1. 

Dissolve 0.50 g chromazurol S (C23Hj[3Cl2Na309S) in 1 litre water in which 2 g of gum arabic has been dissolved. Leave to stand for several days, filter and store in an amber bottle. The solution keeps for several... 

Hasegawa, S.-l, Kobayashi,T, Sato, K., Igarashi, S., and Naito, K. (1999). Determination of trace elements in high purity iron by chromazurol B separation/ICP-MS. Mater. Trans. JIM 40 8), 1069. 

Strictly, the name Chromazurol S applies to the trisodium salt. 

In, Th, Zr) with some chelating reagents (e.g. chromazurol S, bromopyrogallol red, phenylfluorone) forms ternary complexes. 

C23H42CIN M 368.044 Used as 0.2% aq. soln. to increase sensitivity in photometric detn. of metals (e.g. Al, Be, Ga, Th, with some chelating reagents (e.g. chromazurol S, phenylfluorone) (forms ternary complexes). Commercially available as dihydrate. Colourless or pale yellow powder. Sol. H2O, EtOH, Me2CO. Mp 63-65° (dihydrate). 

Chloro-6-(2-thiazolylazo)-1,3-benzenediol, C-00263 Chromazurol S Tri-Na salt, in C-00277 Chromotropic acid, C-00294... 

Bromochlorophenol blue, B-00497 Bromocresol green, B-00498 Bromocresol purple, B-00499 Bromophenol blue, B-00542 Bromophenol red, B-00543 Bromophthalexon S, B-00559 Bromopyrogallol red, B-00574 Bromothymol blue, B-00581 Bromoxylenol blue, B-00583 Butylrhodamine B, in R-00002 C.I. Basic blue 20 Dichloride, in C-00002 C.L Basic violet 2 B, HCl, in C-00003 >Ceplac, in E-00020 2 -Chlorofluorescein, C-00116 4 -Chlorofluorescein, C-00117 Chlorophenol red, C-00197 Chromal blue G Di-Na salt, in C-00275 Chromazurol S Tri-Na salt, in C-00277 Chrome green G, C-00283 Chromoxane violet R, in E-00015 Chromoxan violet 5B, C-00295 o-Cresolbenzein, C-00305 m-Cresolphthalein, C-00306... 

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