Hydroxynaphthol blue
indicator for metal titration
Reagent
Code: #51986
Alias
Hydroxynaphthol blue, 1-(2-hydroxy-4-sulfo-1-naphthazo)-2-naphthol-3,6-disulfonic acid trisodium salt, 4-hydroxy-2-(4-hydroxy -1-sulfo-2-naphthazo)naphthalene-2,7-disulfonic acid trisodium salt
CAS Number
63451-35-4
Properties
Maximum Wavelength: ~ 650 nm
science Other reagents with same CAS 63451-35-4
blur_circular Chemical Specifications
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Molecular Information
Weight
620.47 g/mol
Formula
C₂₀H₁₁N₂Na₃O₁₁S₃
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Registry Numbers
EC Number
264-197-7
MDL Number
MFCD00036393
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Storage & Handling
Storage
room temperature
description Product Description
Hydroxynaphthol blue is widely used as a metallochromic indicator in complexometric titrations, particularly for the determination of calcium and magnesium ions in water hardness testing. It forms distinct color changes in the presence of these metal ions, making it a valuable tool in analytical chemistry. Additionally, it is employed in biochemical research for studying metal ion interactions with proteins and other biomolecules. Its ability to chelate metal ions also finds applications in industrial processes, such as in the treatment of wastewater to monitor and control metal ion concentrations.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Loss on Drying | 0-6% |
| Appearance | Grey to dark purple powder |
| Sensitiveness Test | PASS |
| Suitability for Ca Determination | PASS |
| Solubility in Water (0.1) | Clear red solution |
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