Synthesis of potassium tetraiodomercurate

Preparation of potassium tetraiodomercurate(II) dihytrate

Preparation of potassium tetraiodomercurate(II) dihytrate

Preparation of potassium tetraiodomercurate(II) dihytrate

A solution of 13.5g of mercuric chloride in 200ml of water is mixed with 16.6g of potassium iodide in 150ml of water and the red precipitate of mercuric iodide is filtered off, washed with two 25ml portions of water, and drained dry. It is then dissolved in a hot solution of 16g more of potassium iodide in 10ml of water, the yellow supernatant liquid is decanted from the small residue of undissolved mercuric iodide, and allowed to crystallize in vacuo over concentrated sulphuric acid. The crystalline crusts on the surface should be broken up from time to time. The final paste of light yellow crystals is completely dried in an ordinary desiccator. Based on the mercuric chloride taken, the yield is almost quantitative. The product is deliquescent and should be stored in tightly stoppered vessels to avoid absorption of moisture from the air.

Inorganic laboratory preparations, by G. G. Schlessinger, 96, 1962





InChI Key


Canonical SMILES


MeSH Synonyms

potassium tetraiodomercurate

Depositor-Supplied Synonyms

Nesslers, Mayer’s reagent, Nessler’s reagent, Channing’s solution, Potassium iodomercurate, Mercury potassium iodide, MERCURIC POTASSIUM IODIDE, Nessler reagent, Potassium tetraiodomercurate(II), Potassium mercuric iodide, Potassium tetraiodomercurate, Mercury(II) potassium iodide, Caswell No. 695, Potassium mercuriiodide, Potassium mercury iodine, Dipotassium tetraiodomercurate(2-), Dipotassium tetraiodomercurate, 7783-33-7, Mercuric potassium iodide, solid, HSDB 1243, Solution potassium iodohydragyrate, Potassium tetraiodomercurate (II), Mercury potassium iodide (K2HgI4), EINECS 231-990-4, UN1643, EPA Pesticide Chemical Code 052107, Mercurate(2-), tetraiodo-, dipotassium, Mercurate (2-), tetraiodo-, dipotassium, Mercury(II) chloride – potassium iodide solution, Mercurate(2-), tetraiodo-, dipotassium, (T-4)-, Mercurate(2-), tetraiodo-, dipotassium, (beta-4)-, Potassium tetraiodomercurate – Potassium hydroxide solution, Nesslers Reagenz, reactivo de Nessler, NESSLER’SREAGENT, HgI4.2K, Kaliumtetraiodomercurat(II), AC1L2NI9, K2[HgI4], potassium tetraiodidomercurate, 36048_RIEDEL, 00665_FLUKA, 36048_FLUKA, 72190_FLUKA, CHEBI:51568, dipotassium tetraiodomercury(2-), potassium tetraiodidomercurate(II), potassium tetraiodidomercurate(2-), 8727AF, AKOS015902445, DIPOTASSIUM TETRAIODOMERCURATE(II), Mayer inverted exclamation markas reagent, IN002191, LS-89551, Nessler inverted exclamation mark s reagent, FT-0689221, Mercury potassium iodide [UN1643] [Poison], Mercury potassium iodide [UN1643] [Poison], I14-19730, Mercurate(2-), tetraiodo-, potassium (1:2), (T-4)-, Dipotassium tetraiodomercurate(II) in dilute sodium hydroxide, 39377-58-7

Removed Synonyms

UNII-7N83S6IU0F, CID24542, Nessler’s reagent (principal component), MERCURATE(2-),TETRAIODO-, POTASSIUM (1:2), (T-4)-

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