HI
14 compounds have this formula on CompoundList.
- Molar mass
- 127.91g/mol
- Monoisotopic mass
- 135.9179Da
- Atoms
- 2
- Elements
- 2
The formula HI describes a molecule made of 1 hydrogen atom and 1 iodine atom. It is written in Hill notation: with no carbon present, every element is listed in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- H Hydrogen × 10.79%1.008 × 1 = 1.008 g/mol
- I Iodine × 199.21%126.9 × 1 = 126.900 g/mol
Compounds with the formula HI
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 14 of 14 compounds
![[2H]hydrogen iodide chemical structure, HI, CAS 14104-45-1](/s/XMBWDFGMSWQBCA-FTGQXOHASA-N.svg)
Frequently asked questions
What is the molar mass of HI?
The molar mass of HI is 127.91 g/mol, calculated from standard atomic weights for 1 hydrogen atom and 1 iodine atom. The monoisotopic mass is 135.9179 Da.
How many compounds have the formula HI?
CompoundList lists 14 compounds with the molecular formula HI, including Hydrogen iodide, (~124~I)Hydrogen iodide, [2H]hydrogen iodide. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.