Potassium Iodide

KI

IUPAC: Potassium iodide

CAS: 7681-11-0

Overview

Potassium iodide is a salt used to protect the thyroid gland from radiation and to treat iodine deficiency. It is added to table salt as an iodine supplement.

Composition

Element Symbol Atoms Atomic Mass
Potassium K 1 39.0980
Iodine I 1 126.9000

Elemental Composition

K
Potassium ×1
23.6%
I
Iodine ×1
76.4%

Uses

  • • Radiation protection
  • • Iodized salt
  • • Photography
  • • Expectorant

Fun Facts

  • ✦ Distributed to populations near nuclear power plants for emergency thyroid protection

Structure

SMILES

[K+].[I-]

Properties

Type
salt
State
solid
Molar Mass
166.00 g/mol
Density
3.1200 g/cm³
Melting Point
681.0 °C
Boiling Point
1330.0 °C
Solubility
1400 g/L at 20°C

Molecular Descriptors

Exact Mass
165.8682
TPSA
0.0 Ų
H-Bond Donors
0
H-Bond Acceptors
1
Rotatable Bonds
0
Heavy Atoms
2
Complexity
2.0

Related Compounds

Ammonium Bicarbonate

NH₄HCO₃

Ammonium Chloride

NH₄Cl

Ammonium Sulfate

(NH₄)₂SO₄

Barium Carbonate

BaCO₃

Barium Chloride

BaCl₂

Barium Sulfate

BaSO₄

Cadmium Sulfide

CdS

Calcium Acetate

Ca(C₂H₃O₂)₂

Calcium Carbonate

CaCO₃

Calcium Citrate

Ca₃(C₆H₅O₇)₂

Frequently Asked Questions

What is Potassium Iodide?
Potassium Iodide (KI) is a salt compound with the IUPAC name Potassium iodide.
What is the molecular weight of Potassium Iodide?
Potassium Iodide has a molar mass of 166.0 g/mol.
What state is Potassium Iodide at room temperature?
Potassium Iodide is a solid at room temperature.
Is Potassium Iodide organic or inorganic?
Potassium Iodide is classified as an inorganic compound.
What elements make up Potassium Iodide?
Potassium Iodide (KI) is composed of Potassium (K), Iodine (I).