Potassium Benzoate is the potassium salt of Benzoic Acid.
How much products actually contain
No product states its amount yet.
Of the products containing it, 50 list it before the 1% line and 28 after it (usually 1% or less).
Products using this ingredient
12 of 78 confirmed · likeliest to carry enough first · See all 78
ROUND LAB1025 Dokdo Cleanser 150ml, 2-Pack
ROUND LAB1025 Dokdo Cleanser
innisfreeinnisfree Blueberry Rebalancing 5.5 Cleanser (Jumbo)
ROUND LABROUND LAB 1025 Dokdo Cleanser 200ml
ROUND LABROUND LAB Pine Calming Cica Shampoo 400ml
ROUND LABROUND LAB 1025 Dokdo Cleanser 150ml
May YoungVegan Moist Oil to Foam Cleanser 195ml
Mixsoonmixsoon Hasenti Bubble Cleanser 150ml
Banila CoClean It Zero Kiwi Kale Pore Pack Cleanser 180g
make p:remmake p:rem [1M-View YouTuber Pick] Intheca Soothing Cleansing Foam 150ml
SKIN1004SKIN1004 Centella Ampoule Foam
ParnellAHA Omija Porcelain Bubble Peeling Cleanser 180ml
Definition
US FDA substance register · UNII 763YQN2K7K · registered name Potassium benzoate · single chemical substance
Potassium Benzoate is the potassium salt of Benzoic Acid. It conforms to the formula:
Cosmetic roles
Safety & regulatory references
- Restricted
- China · Japan · South Korea
Source: MFDS (Korea) cosmetic regulatory information
Argentina · Brazil
- Maximum concentration permitted at final product : 0.5% (expressed as acid)
ASEAN
- Maximum authorised concentration in the finished cosmetic product : 0.5 % (acid)
Taiwan
- 0.5%
European Union
- Maximum concentration in ready for use preparation : 0.5% (acid)
Source: MFDS (Korea) cosmetic regulatory information
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Restriction V/1a
Source: EU CosIng ingredient list
Reviewed by CIR: Safety Assessment of Benzyl Alcohol, Benzoic Acid and its Salts, and Benzyl Benzoate
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name 安息香酸Ｋ: 本品は、安息香酸（＊）のカリウム塩であり、次の化学式で表される。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 582-25-2
- EC No.EU chemical inventory number
- 209-431-3
- EC No.EU chemical inventory number
- 209-481-3
- DTXSIDUS EPA chemical ID
- DTXSID1027219
- DTXCIDUS EPA compound ID
- DTXCID007219
- IUPAC
- Potassium benzoate
- Molecular formula
- C7H5KO2
- Molecular weight
- 160.213 g/mol
Measured properties
- Appearance
- Large Crystals · White crystalline powder
- Melting point
- for benzoic acidMelting range of benzoic acid isolated by acidification and not recrystallised 121,5 °C to 123,5 °C, after vacuum drying in a sulphuric acid desiccator
- Colour
- white
- Odour
- odourless
- pH
- 2.8
- Melting/freezing point
- 122.4 ℃
- Initial boiling point and range
- 249.2 ℃(760mm Hg)
- Vapour pressure
- 0.00007 ㎜Hg (25℃)
- Water solubility
- 0.3 g/㎖ (WATER)
- Vapour density
- 4.21 (Air= 1)
- Relative density
- 1.2659 (15℃/4℃)
- n-Octanol/water partition coefficient (Kow)
- -2.269
- Viscosity
- (1.26 mPa s, 130℃)
- Molecular weight
- 122.13
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 11 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.
- Preservative7
- Processing aids not otherwise specified2
- Biocide1
- Antioxidant1
Source: US EPA CompTox dashboard
Related literature
- Evaluation of Antimicrobial and Biofilm Inhibition Effects of Cosmetic Preservative Alternatives on Skin Microbiome · 2026
- Volumetric and Ultrasonic Investigation of Glycolic and Malic Acids with Water-Soluble Potassium Benzoate Solutions at Different Temperatures · 2025
- Thermodynamic Analysis of Tartaric and Lactobionic Acids with Aqueous Potassium Benzoate Mixtures through Volumetric and Acoustic Methods · 2025
Linked databases 21
- Australian Industrial Chemicals Inventory (AICIS)
- 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
- MFDS (Korea) cosmetic regulatory information 2 3
- NIST Chemistry WebBook
- PubChem
- Tlooto literature search 2 3
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · English · Japanese · Chinese