Iodoform

• Iodoform
• Triiodomethane
• Formyltriiodid

D09AA13

Yellow, shining leaflets, hexagonal panels or lemon yellow, fine powder with odor safranartigem

Fixed

4.008 g · cm -3 ( 20 ° C)

123 ° C.

218 ° C

• Poorly in water ( 0.1 g · l-1 at 20 ° C)
• Poor in fatty oils and glycerin
• Well in chloroform, diethyl ether and carbon disulfide

Attention

3 mg · m-3

355 mg · kg -1 ( LD50, rat, oral)

181.1 ± 1.0 kJ · mol -1

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Iodoform (sum formula CHI3 ) is a yellow, saffron -like odor chemical compound of carbon, hydrogen and iodine, and a simple halogenated hydrocarbon.

After Fieser & Fieser iodoform together with Tetraiodmethan the only colored unsaturated organic compound without structural element.

History

Georges Serrulas introduced iodoform in 1822 for the first time ago, Jean Baptiste Dumas introduced in 1834 on the right formula.

Production and representation

Iodoform can be obtained using Lugol's solution of compounds with CH 3 CO - group, such as ethanol or acetone. This reaction makes the Iodoformprobe advantage, with the said group can be demonstrated. These triggers, for example, ethanol in sodium hydroxide solution and are Lugol's solution.

The exact mechanism for the presentation of iodoform in ethanol or acetone is similar to the mechanism of the haloform reaction.

Iodoform can be produced in water by electrolysis from a warm solution of potassium iodide, sodium carbonate and ethanol.

Use

It is used to Takai olefination.

Medical use

Earlier ( Iodoformether ) was used in dentistry for the disinfection of wounds, since it emits a small amount of iodine disinfecting action to the wound moisture iodoform dissolved in diethyl ether. At the same time it dried the wound, nursing minor bleeding and decreased wound pain. Because of its characteristic intense odor, the high price and the harmfulness at high doses iodoform is used medically any more.