Xylenol orange tetrasodium salt
Xylenol orange contains one sulfonic acid, four carboxyl groups, two amino groups, and two hydroxy groups, each of which can be protonated or deprotonated. At pH ≈ 4.5, xylenol orange exists in a lemon-yellow form. In this form, xylenol orange forms a weak red to red-violet complex with some polyvalent metal ions, which is destroyed by the addition of a stronger complexing agent such as EDTA.
Use : As an indicator in titration. Typical concentration: 1 ml / 100 ml (1% solution). Approximate price: 1 g ~ €37.00. Purchase: https://www.carlroth.com/de/de/ph-indikatoren/xylenolorange-tetranatriumsalz/p/2727.3
Technical information on Xylenol Orange Tetrasodium Salt
| To determine | Bi Cd Co Cu Fe Hg In Pb Sc Th Tl(III) V(V) Zn Zr rare earth metals |
| Color change | yellow -> orange-red |
| pH transition range | 6.4 - 10.4 |
ID: 654
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