“Study the effect of changing positions on some of the spectral properties of the new Azo dye [sodium (E)-7-amino-3-((2-(hydrogenarsonato) phenyl) diazenyl)-3-hydroxynaphthalene -1-sulfonate] and compare it with other Azo dye prepared in advance [sodium (Z)-4-amino-2-((2-(hydrogenarsonato) phenyl) diazenyl)-4-hydroxynaphthalene -2-sulfonate]”, UTJsci, vol. 6, no. 2, pp. 52–60, Jun. 2017, doi: 10.32792/utq/utjsci/v6i2.87.