Product Overview

Mercuric Iodide Red 99% AR/ACS (CAS No. 7774-29-0) is analytical-reagent red mercury(II) iodide, HgI₂. It forms strongly iodide-coordinated mercury complexes in excess iodide and provides the mercury component used in classical mercury–iodide analytical reagent systems.

The AR/ACS grade is intended for conventional analytical reagent preparation and Hg(II)/iodide chemistry. It is particularly relevant to preparation of alkaline tetraiodomercurate reagent systems used in classical ammonia determination, as well as solution-equilibrium and complexation studies involving mercury(II) and iodide.

Typical Applications

• Preparation of mercury–iodide analytical reagents
• Preparation of tetraiodomercurate-containing reagent systems
• Classical ammonia determination reagent preparation
• Hg(II)/iodide complexation studies
• Preparation of non-certified mercury iodide working systems
• Analytical phase and solubility investigations
• Method verification involving mercury–iodide chemistry

Common Synonyms

• Mercury(II) iodide
• Mercuric iodide
• Mercury diiodide
• Diiodomercury
• Red mercuric iodide
• Coccinite

Storage Conditions

Store tightly closed and protected from direct light, excessive heat and analytical contamination. Preserve the red form and avoid unnecessary heating that may promote reversible polymorphic conversion.