Potassium oxide is a metal oxide with formula K2O.
Definition
US FDA substance register · UNII 58D606078H · registered name POTASSIUM OXIDE · single chemical substance
Potassium oxide is a metal oxide with formula K2O. It is a metal oxide and a potassium salt.
Source: PubChem
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
Names & identifiers
- CAS No.chemical registry number
- 12136-45-7
- EC No.EU chemical inventory number
- 235-227-6
- DTXSIDUS EPA chemical ID
- DTXSID3049754
- DTXCIDUS EPA compound ID
- DTXCID501323193
- IUPAC
- Dipotassium oxide
- Molecular formula
- K2O
- Molecular weight
- 94.196 g/mol
Measured properties
- Appearance
- Potassium monoxide appears as a white-colored crystalline solid. Denser than water. Contact may severely irritate skin, eyes and mucous membranes. May be toxic by ingestion, inhalation and skin absorption. Used to make other chemicals. · Dry Powder, Other Solid, Liquid, Large Crystals, CBI
- Solubility
- Solubility in water: reaction
- Density
- 2.3 g/cm³
- Melting/freezing point
- 350 ℃
- Relative density
- 2.32
- Decomposition temperature
- 350 ℃
- Molecular weight
- 94.20
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: PubChem · KOSHA safety data sheets (Korea)
What products actually use it for
What the 20 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.
- Binder4
- Flux agent3
- Catalyst2
- Dehydrating agent (desiccant)2
- Intermediate2
- Coalescing agent1
- pH regulating agent1
- Degradant/impurity (EPA)1
4 other uses
- Abrasive1
- Pigment1
- Adsorbent1
- Chemical reaction regulator1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
2 skin studies and 1 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 3 studies
- Skin corrosion/irritation - Category 1
Skin Irritation · Screening - Category 8.2B (Category 1B)
Skin Irritation · Read Across - Category 8.3A (Category 1)
Eye Irritation · Read Across
Source: US EPA CompTox dashboard
Related literature
Linked databases 17
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- EU CosIng ingredient list 2
- 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 2
- Tlooto literature search
- 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