2017. 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]. University of Thi-Qar Journal of Science. 6, 2 (Jun. 2017), 52–60. DOI:https://doi.org/10.32792/utq/utjsci/v6i2.87.