What does triiodomethane mean?
Triiodomethane is the systematic chemical name for iodoform, a compound with the formula CHI3. It is a yellow crystalline solid that is produced in certain organic reactions and is valued in analytical chemistry. The compound has long been associated with antisepsis, although modern antiseptic use is limited. In technical writing, triiodomethane identifies the substance by its systematic, structure-based name, while iodoform remains the familiar name in laboratory, medical, and historical sources. The iodoform reaction is used to identify methyl ketones and certain related compounds because triiodomethane forms as a yellow product. Outside chemistry and related technical fields, the word has little everyday use. It is nevertheless useful because it makes a once-prominent antiseptic and standard laboratory test recognizable by naming the exact compound responsible for the characteristic reaction and yellow crystals.
nounA chemical compound with the formula CHI3, a yellow crystalline solid also known as iodoform. It is produced in certain organic reactions and has been used as an antiseptic.
- The systematic chemical name for iodoform, a yellow crystalline compound with the formula CHI3 used in organic and analytical chemistry and formerly as an antiseptic.
"The laboratory identified the yellow product as triiodomethane, the compound also known as iodoform."
"The reaction produced triiodomethane, recognizable by its characteristic yellow crystals."
"Triiodomethane is formed during the iodoform test for methyl ketones and certain related compounds."
The plural is uncommon because this name is normally used as a mass noun for the chemical substance; it may be used when referring to multiple samples or preparations.
"The results were compared across two independently prepared triiodomethanes."
Triiodomethane is iodoform with the name written in full: three iodine atoms, one carbon, and one hydrogen.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does triiodomethane come from?
The name is formed systematically from tri-, meaning three, iodo-, referring to iodine, and methane, the parent hydrocarbon. The element name iodine comes from Greek iṓdē, meaning violet, a reference to the characteristic colour of its vapour. Related English words such as iodide, iodate, and iodize share this iodine-based origin.
How triiodomethane is actually used
This is specialized chemistry terminology. Iodoform is more common in laboratory, medical, and historical sources, while triiodomethane emphasizes the compound's systematic chemical name.
Easily confused with triiodomethane
Triiodomethane is CHI3 and contains three iodine atoms, whereas iodomethane is CH3I and contains only one.