7784-03-4

Yellow powder, becomes red at 40–50C. Soluble in solutions of potassium cyanide or potassium iodide; insoluble in dilute acids and water.

Thermal sensor to detect overheating in journal bearings, etc., becomes blood-red at 40-50° and yellow again on cooling.

Highly toxic by ingestion, inhalation, and skin absorption.

Mercury silver iodide was synthesized as follows: the raw materials for the synthesis were mercury nitrate, potassium iodide and silver nitrate were dialyzed pure reagents. Weigh 3.3362 g (0.01 mol) Hg (NO) 2 added to 120 ml of distilled water, stirring c