Potassium iodide
CAS 7681-11-0
EC 231-659-4
Formula IK
MW 166 g/mol
Salts & Minerals Food & NutritionPharmaceuticals & HealthcareAgriculture & FeedBiotechnology & Life Sciences CatalysisPreservation & BiocidepH Regulation & BufferingFlame Retardancy
Description
Potassium iodide (CAS 7681-11-0, EC 231-659-4, formula KI) is an inorganic salt supplied under trade names including K1-N, Kaiod, Pherajod, Ceoiodin, and Knollide. It carries no assigned E-code but is recognised under pharmaceutical and food-grade regulatory frameworks across European markets.
In pharmaceutical manufacturing, potassium iodide serves as an active ingredient in thyroid-blocking formulations, where iodide ions competitively inhibit thyroid iodine uptake. In food and nutrition, it functions as an iodine fortification additive in salt and feed premixes, correcting dietary iodine deficiency at precisely controlled dosage levels. It also acts as a catalyst and buffering agent in select chemical synthesis processes.
Potassium iodide is available in Ph.Eur., USP/FCC, and technical grades, supplied as powder, granules, or round-particle crystals. It is fully REACH-registered and compliant with EU food and feed additive regulations. Standard packaging includes 25 kg bags and fibre drums, with bulk options available on request.
In pharmaceutical manufacturing, potassium iodide serves as an active ingredient in thyroid-blocking formulations, where iodide ions competitively inhibit thyroid iodine uptake. In food and nutrition, it functions as an iodine fortification additive in salt and feed premixes, correcting dietary iodine deficiency at precisely controlled dosage levels. It also acts as a catalyst and buffering agent in select chemical synthesis processes.
Potassium iodide is available in Ph.Eur., USP/FCC, and technical grades, supplied as powder, granules, or round-particle crystals. It is fully REACH-registered and compliant with EU food and feed additive regulations. Standard packaging includes 25 kg bags and fibre drums, with bulk options available on request.
Physical Properties
| Melting Point | 680 °C |
| Boiling Point | 1330 °C |
| Density | 3.13 g/cm³ |
| Flash Point | 1330°C |
| Appearance | White crystals, granules, or powder; strong, bitter, saline taste. Soluble in water, alcohol, acetone, and glyc- erol. |
| Color | Yellow |
| Odor | odorless |
| Form | particles (round) |
| Water Solubility | 1.43 kg/L |
| Vapor Pressure | 0.31 mm Hg ( 25 °C) |
| Refractive Index | 1.677 |
| pH | 6.0-9.0 (25℃, 1M in H2O) |
| Log P | -0.958 at 25℃ |
Safety & Handling (Learn More)
Danger GHS07 GHS08 GHS09
H
H302H315H317H319H320H334H360H361H362H370H372H373H411
P
P203P233P260P261P263P264P270P271P272P273P280P284P318P319P321P330P391P403P405P501P264+P265P301+P317P302+P352P304+P340P308+P316P332+P317P333+P317P337+P317P342+P316P362+P364P305+P351+P338
Trade & Regulatory
| HS Code | 28276000 |
| UN Number | 2056 |
| ADR Class | 3 |
| Packing Group | II |
| Storage Class | 6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects |
| WGK (Germany) | 1 |
Other Names
K1-NKaiodIODINEIODIDECeoiodinPherajodKnollideAsmofug E
Related Products
Raw Materials
Need a chemical? Get a quote within 24 hours.