Potassium iodide is a metal iodide salt with a K(+) counterion.
How much products actually contain
No product states its amount yet.
Of the products containing it, 5 list it before the 1% line and 1 after it (usually 1% or less).
Products using this ingredient
6 of 6 confirmed · likeliest to carry enough first
Definition
Potassium iodide is a metal iodide salt with a K(+) counterion. It is a scavenger of hydroxyl radicals. It has a role as a NMR chemical shift reference compound, a radical scavenger and an expectorant. It contains an iodide.
Source: PubChem
US FDA substance register · UNII 1C4QK22F9J · registered name Potassium iodide · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name ヨウ化K: 本品は、次の化学式で表されるカリウム塩である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 7681-11-0
- EC No.EU chemical inventory number
- 231-659-4
- DTXSIDUS EPA chemical ID
- DTXSID7034836
- DTXCIDUS EPA compound ID
- DTXCID5014836
- IUPAC
- Potassium iodide
- Molecular formula
- IK
- Molecular weight
- 166.0028 g/mol
Measured properties
- pH
- 7~9
- Melting/freezing point
- 681 ℃
- Initial boiling point and range
- 1323 ℃
- Water solubility
- 148 g/100g (25℃)
- Relative density
- 3.12 (25℃)
- Molecular weight
- 166.0032
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 47 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Stabilizing agent16
- Flavouring and nutrient16
- Processing aids not otherwise specified3
- Biocide2
- Heat stabilizer2
- Surface modifier2
- No specific technical function1
- Tracer1
4 other uses
- Ion exchange agent1
- Corrosion inhibitor1
- UV stabilizer1
- Intermediate1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
4 skin studies and 3 eye studies are on record.
The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 7 studies
- Classification not possible
Skin Irritation · Screening - Classification not possible
Skin Sensitization · Screening - Category 6.5B (Category 1)
Skin Sensitization · Read Across - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: according to - Category 2B
Eye Irritation · Screening
Source: US EPA CompTox dashboard
Related literature
- Erythema annulare centrifugum-like neutrophilic dermatosis: effects of potassium iodide. · 2012
- Potassium Iodide in Dermatology- Recent Advances in Mechanism of Action, Preparation, Uses and Adverse Effects · 2025
- Sporotrichosis refractory to conventional treatment: therapeutic success with potassium iodide · 2021
- Use of potassium iodide in Dermatology: updates on an old drug · 2013
- Oral potassium iodide for the treatment of sporotrichosis. · 2009
Linked databases 20
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese