| Identification | Back Directory | [Name]
ARSENAZO III DISODIUM SALT | [CAS]
62337-00-2 | [Synonyms]
ARSENAZO III
ARSENAZO III DISODIUM SALT
Arsenazo III disodium salt p.a.
ARSENAZO III DISODIUM SALT, REAG.
2,7-BIS(O-ARSONOPHENYLAZO) CHROMOTROPIC ACID
disodium 3,6-bis[(o-arsonophenyl)azo]-4,5-dihydroxynaphthalene-2,7-disulphonate
2,7-BIS(2-ARSENOPHENYLAZO)-1,8-DIHYDROXYNAPHTALENE-3,6-DISULFONIC ACID, DISODIUM SALT
3,6-Bis[(2-arsonophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt
3,6-bis(2,2'-arsonophenylazo)-4,5-dihydroxy-2,7-naphthalenedisulfonic acid, disodium salt
3,6-Bis[2-(2-arsonophenyl)diazenyl]-4,5-dihydroxy-2,7-naphthalenedisulfonic Acid SodiuM Salt | [EINECS(EC#)]
216-788-6 | [Molecular Formula]
C22H16As2N4Na2O14S2 | [MDL Number]
MFCD00003936 | [MOL File]
62337-00-2.mol | [Molecular Weight]
820.33 |
| Chemical Properties | Back Directory | [Appearance]
dark brown to brownish-black crystalline powder | [Melting point ]
>320 °C(lit.)
| [color ]
Clear pink | [Water Solubility ]
Soluble in water. |
| Hazard Information | Back Directory | [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.] |
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Alfa Aesar
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400-6106006 |
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http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
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021-021-58432009 400-005-6266 |
| Website: |
http://www.energy-chemical.com |
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