Potassium tetraiodomercurate (II)
Reagent grade, 98%
Reagent
Code: #169523
Alias
Potassium mercury iodide; Potassium mercury, Neith reagent, Neith reagent
CAS Number
7783-33-7
blur_circular Chemical Specifications
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Molecular Information
Weight
786.4 g/mol
Formula
K₂HgI₄
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Registry Numbers
MDL Number
MFCD00049656
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Physical Properties
Melting Point
120-127 °C(lit.)
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Storage & Handling
Density
4.29 g/mL at 20 °C
Storage
Room temperature, avoid light
description Product Description
Used in analytical chemistry as a key component of Nessler's reagent for the detection of ammonia and ammonium ions. It forms a yellow to orange precipitate when reacting with ammonium ions in neutral or slightly acidic solutions, making it valuable in qualitative inorganic analysis. Also employed in the preparation of other mercury-containing compounds and in some historical medicinal formulations, though such uses are now limited due to toxicity concerns.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Assay | 98-100% |
| Heavy Metals (as Pb) | ≤0.002% |
| Mercury (Hg+) | 0-0.01% |
| Appearance | Yellow to yellow-green crystals |
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