Mercury(II) iodide, 99.0+%

CAS Number: 7774-29-0

Linear Formula: HgI2

Molecular Weight: 454.40

IUPAC Name: Mercury(II) iodide

Other Names: Mercuris iodide red, Mercuric diiodide, Red mercury

More details

CAS Number:
New product

15,00 €

- +

 
More info

Mercury(II) iodide is a chemical compound with the molecular formula HgI2. It is typically produced synthetically but can also be found in nature as the extremely rare mineral coccinite. Unlike the related mercury(II) chloride it is hardly soluble in water.

Mercury(II) iodide is produced by adding an aqueous solution of potassium iodide to an aqueous solution of mercury(II) chloride with stirring; the precipitate is filtered off, washed and dried at 70 °C:

HgCl2 + 2 KI → HgI2 + KCl

Mercury(II) iodide displays thermochromism; when heated above 126 °C (400 K) it undergoes a phase transition, from the red alpha crystalline form to a pale yellow beta form. As the sample cools, it gradually reacquires its original colour. It has often used for thermochromism demonstrations. A third orange form is also known; this can be formed by recrystallisation and is also metastable, eventually converting back to the red alpha form. The various forms can exist in a diverse range of crystal structures and as a result mercury(II) iodide possess a surprisingly complex phase diagram.

Mercury(II) iodide is used for preparation of Nessler's reagent, used for detection of presence of ammonia.

Mercury(II) iodide is a semiconductor material, used in some x-ray and gamma ray detection and imaging devices operating at room temperatures.

In veterinary medicine, mercury(II) iodide is used in blister ointments in exostoses, bursal enlargement, etc.

It can appear as a precipitate in many reactions.

 
Data sheet
Chemical purity99.0+%
Molecular FormulaHgI2
Molecular Weight454.40

Write a review

Mercury(II) iodide, 99.0+%

CAS Number: 7774-29-0

Linear Formula: HgI2

Molecular Weight: 454.40

IUPAC Name: Mercury(II) iodide

Other Names: Mercuris iodide red, Mercuric diiodide, Red mercury

Write a review

30 other products in the same category:

No products

To be determined Shipping
0,00 € Total

Check out