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J & K SCIENTIFIC LTD.
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010-82848833- ;010-82848833- |
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| Products Intro: |
Product Name:Arsenazo-III DisodiuM Salt
CAS:62337-00-2
Package:100Mg,1g |
| Company Name: |
Alfa Aesar
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| Tel: |
400-610-6006; 021-67582000 |
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saleschina@alfa-asia.com |
| Products Intro: |
Product Name:Arsenazo III disodiuM salt
CAS:62337-00-2
Package:1g Remarks:A11838 |
|
| | ARSENAZO III DISODIUM SALT Basic information |
| Product Name: | ARSENAZO III DISODIUM SALT | | Synonyms: | Arsenazo III disodium salt p.a.;3,6-Bis[2-(2-arsonophenyl)diazenyl]-4,5-dihydroxy-2,7-naphthalenedisulfonic Acid SodiuM Salt;ARSENAZO III DISODIUM SALT;2,7-BIS(O-ARSONOPHENYLAZO) CHROMOTROPIC ACID;2,7-BIS(2-ARSENOPHENYLAZO)-1,8-DIHYDROXYNAPHTALENE-3,6-DISULFONIC ACID, DISODIUM SALT;disodium 3,6-bis[(o-arsonophenyl)azo]-4,5-dihydroxynaphthalene-2,7-disulphonate;ARSENAZO III DISODIUM SALT, REAG.;3,6-bis(2,2'-arsonophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid, disodium salt | | CAS: | 62337-00-2 | | MF: | C22H16As2N4Na2O14S2 | | MW: | 820.33 | | EINECS: | 263-516-7 | | Product Categories: | Aromatics;Sulfur & Selenium Compounds | | Mol File: | 62337-00-2.mol |  |
| | ARSENAZO III DISODIUM SALT Chemical Properties |
| Melting point | >320 °C(lit.)
| | color | Clear pink | | Water Solubility | Soluble in water. |
| | ARSENAZO III DISODIUM SALT Usage And Synthesis |
| Chemical Properties | dark brown to brownish-black crystalline powder | | Uses | Arsenazo-III is a diazo dye reagent used in the spectrophotometric determination of aluminum, gallium and indium.
Toxic if swallowed. Toxic if inhaled. Very toxic to aquatic life. | | Purification Methods | Contaminants include monoazo derivatives, starting materials for synthesis and by-products. It is partially purified by precipitation of the dye from aqueous alkali on addition of HCl. More thorough purification is achieved by taking a 2g sample in 15-25mL of 5% aqueous NH3 and filter. Add 10mL HCl (1:1) to the filtrate to precipitate the dye. Repeat the procedure and dissolve the solid dye (0.5g) in 7mL of a 1:1:1 mixture of n-propanol/conc NH3/water at 50o. After cooling, filter the solution and chromatograph the filtrate through a cellulose column using a 3:1:1 mixture of n-propanol/conc NH3/water as eluent. Collect the blue band and evaporate it to 10-15mL below 80o, then add 10mL of conc HCl to precipitate pure Arsenazo III. Wash it with EtOH and dry it in air [Borak et al. Talanta 17 215 1970]. The sodium salt is then obtained by dissolving it in the equivalent amount of dilute NaOH and freeze-drying. The purity of the dye can be checked by paper chromatography using M HCl as eluent. It is used for the estimation of Th, U, Zr, Cd and Zn [Michaylova & Yuroukova Anal Chim Acta 68 73 1974.] |
| | ARSENAZO III DISODIUM SALT Preparation Products And Raw materials |
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