In the segment of Euclid solid products, there is chelating ion-exchanger called 1-Nitroso-2-naphthol that is used in the synthesis process of alumina adsorbents that showcase acidic, basic and neutral nature. When it comes its use, it can remove and preconcentrate Pb(II), Cu(II), Cr(III) from waste and drinking water. Another use of 1-Nitroso-2-naphthol to preconcentrate cobalt making use of C(18) microcolumn together with flow injection that is used with a flame atomic absorption spectrometry system. It is also used to prepare 1-nitroso-2-naphthol-sodium nitrite reagent. It comes in glass bottles of different sizes.