아르세나조III이나트륨염

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H301：삼키면 유독함

  H331：흡입하면 유독함

  H400：수생생물에 매우 유독함

  H410：장기적 영향에 의해 수생생물에 매우 유독함

• 예방조치문구

  P261：분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.

  P304+P340：흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.

  P405：밀봉하여 저장하시오.

아르세나조III이나트륨염 화학적 특성, 용도, 생산

• 화학적 성질

  dark brown to brownish-black crystalline powder

• 용도

  Arsenazo III disodium salt is a diazo dye reagent used in the spectrophotometric determination of aluminum, gallium and indium. Further, it is used in the complexometric determination of lanthanides, thallium, scandium thorium, uranium and yttrium. In addition to this, it acts as a metal indicator and form specifically colored metal ion complexes in aqueous media.

• 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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