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| | Nessler's Reagent Basic information |
| Product Name: | Nessler's Reagent | | Synonyms: | tetraiodomercury(2-);MERCURIC POTASSIUM IODIDE, REAGENTMERCURIC POTASSIUM IODIDE, REAGENTMERCURIC POTASSIUM IODIDE, REAGENTMERCURIC POTASSIUM IODIDE, REAGENT;NESSLER'S REAGENT SOLUTION;AMMONIA NITROGEN 2;MAYER'S REAGENT;MERCURY(II) POTASSIUM IODIDE;MERCURIC POTASSIUM IODIDE;MERCURIC-POTASSIUM IODIDE TS | | CAS: | 7783-33-7 | | MF: | HgI4K2 | | MW: | 786.4 | | EINECS: | 231-990-4 | | Product Categories: | Inorganics | | Mol File: | 7783-33-7.mol |  |
| | Nessler's Reagent Chemical Properties |
| Melting point | 120-127 °C(lit.) | | Boiling point | 105°C | | density | 1.16 g/mL at 20 °C | | Fp | >230 °F | | storage temp. | 2-30°C | | solubility | very soluble in H2O; soluble in ethanol,ethyl ether, acetone | | form | Liquid | | color | Yellow to orange | | Specific Gravity | 1.097 | | Odor | Odorless | | PH | 9.2 (20°C in H2O) | | Water Solubility | Soluble in water. | | Sensitive | Hygroscopic | | Merck | 13,7773 | | Exposure limits | ACGIH: TWA 0.025 mg/m3 (Skin)
NIOSH: IDLH 10 mg/m3; TWA 0.05 mg/m3; Ceiling 0.1 mg/m3 | | Stability: | Stable, but light sensitive. Incompatible with strong oxidizing agents. | | InChIKey | OPCMAZHMYZRPID-UHFFFAOYSA-J | | EPA Substance Registry System | Potassium mercuric iodide (7783-33-7) |
| | Nessler's Reagent Usage And Synthesis |
| Chemical Properties | light yellow liquid | | Uses | Nessler's reagent (K2[HgI4]) is used to detect the presence of ammonia, particularly in very small amounts. | | Uses | Mercury(II) potassium iodide is used as a pharmaceutical intermediate. It is also used as reagents, chemical research and organic intermediates. | | Preparation | It is prepared by mixing 2g potassium iodide in 5ml water. To this solution, 3g of mercury (II) iodide is added, and the resulting solution is made to 20ml. Finally, 40g potassium hydroxide (30 %) is added to provide the alkaline base. | | Definition | Nessler's Reagent is a periodometallate salt that is solution of mercuric iodide in potassium iodide. It contains a tetraiodomercurate(2-). | | General Description | Mercuric potassium iodide, [solid] appears as odorless yellow crystals. Crystallizes with either one, two or three molecules of water. Soluble in water and denser than water. Commercially available in the anhydrous form. Highly toxic by ingestion, inhalation, and skin absorption. | | Air & Water Reactions | Deliquescent. Very water soluble. | | Reactivity Profile | MERCURIC POTASSIUM IODIDE is incompatible with acetylene, ammonia, chlorine dioxide, azides, calcium (amalgam formation), sodium carbide, lithium, rubidium, copper . NESSLER'S REAGENT behave in aqueous solution as a weak acid. | | Hazard | Highly toxic by ingestion, inhalation, and
skin absorption. | | Health Hazard | Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | | Fire Hazard | Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways. | | Safety Profile | A poison. Moderately
toxic by skin contact and intraperitoneal
routes. When heated to decomposition it
emits very toxic fumes of Hg, K2O, and I-.
See also MERCURY. |
| | Nessler's Reagent Preparation Products And Raw materials |
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