What is Xylenol Orange sodium salt CAS 63721-83-5?
Xylenol Orange sodium salt CAS 63721-83-5 is a complex organic sulfonphthalein dye formulated as a highly water-soluble sodium salt. Typically supplied as a solid powder, it is characterized by its complex multi-ring structure incorporating iminodiacetic acid groups. This specific structural configuration allows it to function as an exceptionally sensitive complexometric indicator. When dissolved in water, it forms distinct visual complexes with various metal ions, making it an indispensable reagent in laboratory titrations, metallurgical analysis, and specialized material testing protocols.
Specifications
| Item |
Value |
| Appearance |
Solid powder |
| Melting Point |
195 °C (Decomposes) |
| Water Solubility |
Highly soluble |
| pKa |
pK2: 2.58; pK3: 3.23; pK4: 6.37; pK5: 10.46; pK6: 12.28 (at 25 °C) |
Features
- Precision Metal Indicator – Acts as a highly accurate complexometric indicator, forming strong, visually distinct complexes with metal ions to facilitate exact analytical determinations.
- Excellent Aqueous Solubility – Readily dissolves in water to form clear, stable indicator solutions, ensuring smooth integration into liquid titrations and diagnostic assays.
- Dynamic pH Reactivity – Exhibits a broad range of precise pKa values, ensuring reliable, pH-dependent colorimetric shifts during complex laboratory testing protocols.
Applications
- Analytical Chemistry – Globally utilized in laboratory environments as a primary complexometric indicator for the accurate titration and spectrophotometric determination of specific metal ions.
- Metallurgical Testing – Specifically applied as a critical reagent in advanced analytical methods for detecting and quantifying the main content of tungsten oxide.
- Diagnostic Assay Manufacturing – Serves as a dependable, highly sensitive functional dye in the formulation and manufacturing of specialized scientific diagnostic test kits.
Packaging
Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.