37864 HYDRANAL – Imidazole Capacity 500gr, Honeywell Fluka
37864 HYDRANAL – Imidazole Capacity 500gr,
HYDRANAL – Imidazole
Buffer substance for Karl Fischer titration
Synonym(s)
Karl Fischer auxiliary
Specifications
| Property | Value |
|---|---|
| suitability (for KF-titration) | test passed |
Properties
| Property | Value |
|---|---|
| Boiling Point/Range | 256 °C |
| Color | Colorless to Yellowish |
| Density | 1.233 g/cm3 (20 °C) |
| Flashpoint | 135 °C |
| For Use With (Equipment) | KF Titration |
| Form | Solid |
| Grade | Auxiliaries for KF Titration |
| Incompatible Materials | Strong acids |
| Lower Explosion Limit | Not applicable |
| Melting Point/Range | 88-90 °C |
| Partition Coefficient | -0.02 (25 °C) |
| Solubility in Water | 633 g/l (20 °C) |
| Upper Explosion Limit | Not applicable |
| Vapor Pressure | 0.003 hPa (20 °C) |
| Viscosity | 2.696 mPa.s (100 °C) |
| pH-Value | 9-11 at 100 g/l (20 °C) |
| Product Line | Hydranal™ |
| Storage Temperature | Ambient |
HYDRANAL™ – Imidazole is a buffering agent specifically formulated for Karl Fischer titration. Its function is to maintain pH stability during the titration process, which is crucial for obtaining accurate moisture measurement results.
HYDRANAL – Imidazole is a reagent used in Karl Fischer (KF) titration, specifically in volumetric and coulometric water determination. Imidazole is employed as a base in Karl Fischer reagents to replace pyridine, which was used traditionally but has disadvantages such as toxicity and unpleasant odor.
Basic Information:
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Name: HYDRANAL – Imidazole
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Function: Buffering agent/base in Karl Fischer titration
-
Application: Water content determination in various substances
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Supplier: Frequently associated with Honeywell’s HYDRANAL line (formerly by Riedel-de Haën)
Why Imidazole in KF Titration?
Imidazole serves several roles:
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Acts as a base to neutralize acids formed during the KF reaction.
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Maintains pH stability, which is crucial for the accuracy of the Karl Fischer reaction.
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Enhances reagent stability and reduces odor, compared to pyridine-based systems.
Advantages over Pyridine:
-
Lower toxicity
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Less pungent odor
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Improved reagent stability
-
Compatible with both volumetric and coulometric methods
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