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Ammonium iodide

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Identification
Molecular formula
NH4I
CAS number
12027-06-4
IUPAC name
ammonium;iodide
State
State

Ammonium iodide is typically a solid at room temperature.

Melting point (Celsius)
551.00
Melting point (Kelvin)
824.00
Boiling point (Celsius)
405.60
Boiling point (Kelvin)
678.80
General information
Molecular weight
144.94g/mol
Molar mass
144.9410g/mol
Density
2.5140g/cm3
Appearence

Ammonium iodide (NH4I) appears as colorless cubic crystals when pure. However, it is hygroscopic and may become yellowish on prolonged exposure to air due to the release of iodine.

Comment on solubility

Solubility of Ammonium Iodide

Ammonium iodide (NH4I) is known for its high solubility in water, making it an interesting compound in various chemical applications. Its solubility can be attributed to the nature of the ammonium ion, which is readily solvated due to its positive charge, and the iodide ion, which is relatively large and has a weak charge density, enhancing water interaction.

Key Points about Ammonium Iodide Solubility:

  • Highly soluble in water, typically at concentrations exceeding 1 g per 10 mL at room temperature.
  • Solubility increases with temperature; warmer water can dissolve more ammonium iodide.
  • Exhibits ion-dipole interactions that facilitate dissolution in polar solvents like water.

The notable ability of ammonium iodide to dissolve well in water can be summarized in the following quote: "Like dissolves like." This means that ionic compounds such as NH4I favor dissolution in polar solvents because of the compatibility of their charges with the dipoles of the solvent molecules.

Overall, the solubility of ammonium iodide is an important characteristic that is leveraged in a variety of chemical processes and reactions, particularly in aqueous environments.

Interesting facts

Interesting Facts about Ammonium Iodide

Ammonium iodide, a fascinating ionic compound, is composed of the ammonium cation and iodide anion. This compound is often used in various applications, and its properties make it a point of interest in both industrial and academic settings.

Key Characteristics

  • Food Additive: Ammonium iodide is sometimes employed as a source of iodine in dietary supplements, playing a crucial role in preventing iodine deficiency.
  • Photography: Historically, this compound was utilized in the development of photographic films, showcasing its relevance in the realm of photography.
  • Research Applications: Due to its unique properties, ammonium iodide is often used in various chemical syntheses and reactions, making it valuable for scientists in laboratories.

Safety and Handling

While ammonium iodide is generally regarded as safe when handled properly, it is important to take standard laboratory precautions to avoid any unintended reactions or exposure. Always ensure proper ventilation and use personal protective equipment (PPE) when working with chemical compounds.

Fun Fact

As a crystalline solid, ammonium iodide can exhibit changes when subjected to heat, transitioning between different states and showcasing the dynamic nature of chemical compounds. This thermal behavior is an interesting aspect for students and chemists alike!

In conclusion, ammonium iodide is more than just a compound; it is a bridge between chemistry and real-world applications that highlights the importance of understanding chemical interactions.

Synonyms
AMMONIUM IODIDE
12027-06-4
azanium iodide
Ammonium-iodid
Ammonium jodatum
Ammoniumiodid
UNII-OZ8F027LDH
OZ8F027LDH
HSDB 476
AMMONIUM IODATUM
EINECS 234-717-7
CHEBI:63040
DTXSID60894063
AMMONIUM IODIDE (MART.)
AMMONIUM IODIDE [MART.]
DTXCID601324106
234-717-7
Ammonium iodide ((NH4)I)
MFCD00011424
H4IN
(NH4)I
(S)-ammonium iodide
NH4I
AMMONIUM IODIDE [MI]
AMMONIUM IODIDE [HSDB]
AMMONIUM IODATUM [HPUS]
AMMONIUM IODIDE [WHO-DD]
AKOS015833259
SY009211
NS00085491