PK2829 Potassium Mercuric Iodide

Catalog No. PK2829
Molecular Formula K2HgI4
CAS Number 7783-33-7
Appearance Yellow crystals or liquid
Purity 99-99.999%
Synonyms Mayer's reagent, Channing's solution, Nessler's re

Potassium Mercuric Iodide (CAS: 7783-33-7) is immediately available in most volumes. High purity, submicron and nano-powder forms may be considered. Stanford Advanced Materials (SAM) has over two decades of experience in the manufacture and sales of high-purity Potassium Mercuric Iodide.

Related product: Potassium Biiodate, Potassium Bisulfate, Potassium Fluoride

Potassium Mercuric Iodide Description

Potassium Mercuric Iodide (CAS: 7783-33-7) is a yellow crystal or liquid used as a pharmaceutical intermediate. It is a complex salt formed by the interaction of 1 molecule of mercuric iodide with 2 molecules of potassium iodide and containing about 25.5 percent of mercury. As a germicide it is claimed to have a greater factor of safety than corrosive mercuric chloride, being only one-half as toxic for animals.


Potassium Mercuric Iodide Potassium Specifications

CAS Number


Molecular formula


Molecular weight

786.4 g/mol


Yellow crystals or liquid


1.16 g/


Potassium Mercuric Iodide Applications

Potassium Mercuric Iodide (CAS: 7783-33-7) can be used as a pharmaceutical intermediate. It is also used as reagents, chemical research, and organic intermediates.

Example: For several years the following solution of this substance has been used in the surgical service of the New Haven Hospital as an antiseptic for preoperative preparation of the skin: 1 percent potassium mercuric iodide in an 85 percent acetone solution with 0.0166 percent eosin as a coloring agent. This solution has proved successful as an antiseptic except for an occasional reddening of the skin.


Safety Information



Signal word


Hazard statements

H290 - H300 + H310 - H314 - H331 - H373 - H410

Precautionary statements

P273 - P280 - P301 + P310 + P330 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 + P310

Personal Protective Equipment

Faceshields, Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter


UN2922 - class 8 - PG 2 - EHS - basic - Corrosive liquids, toxic, n.o.s.

WGK Germany



JOHN LAWRENCE, M.D.; MAURICE J. STRAUSS, M.D.: DERMATITIS DUE TO POTASSIUM MERCURIC IODIDE. Arch Derm Syphilol. 1934; 30(1):76-79. doi:10.1001/archderm.1934.01460130084012


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