7-Hydroxy-(S)-usnate is a member of benzofurans.
Definition
7-Hydroxy-(S)-usnate is a member of benzofurans.
Source: PubChem
US FDA substance register · UNII 0W584PFJ77 · registered name USNIC ACID · single chemical substance
Cosmetic roles
Safety & regulatory references
- Banned
- South Korea
Source: MFDS (Korea) cosmetic regulatory information
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 ウスニン酸: 本品は、次の化学式で表される複素環式化合物である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 125-46-2
- EC No.EU chemical inventory number
- 204-740-7
- DTXSIDUS EPA chemical ID
- DTXSID0040123
- DTXCIDUS EPA compound ID
- DTXCID8020123
- IUPAC
- 2,6-Diacetyl-7,9-dihydroxy-8,9b-dimethyldibenzo[b,d]furan-1,3(2H,9bH)-dione
- Molecular formula
- C18H16O7
- Molecular weight
- 344.319 g/mol
Measured properties
- Appearance
- Yellow solid, [Merck Index] Yellow crystalline solid, [MSDSonline] · ... yellowish /colored/ pigment.
- Melting point
- 204 °C
- Solubility
- Solubility at 25 °C (g/100 ml): acetone, 0.77, ethyl acetate, 0.88, fural, 7.32, furfuryl alcohol, 1.21 · Solubility at 25 °C (g/100 ml): water, <0.01
- Vapour pressure
- 0.2 ㎪
- Water solubility
- 9.316
- Relative density
- 1.04 g/cm³
- Auto-ignition temperature
- 390 ℃
- Molecular weight
- 218.72
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 1 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.
- Biocide1
Source: US EPA CompTox dashboard
Related literature
- Exploring the antioxidant and protective effects of usnic acid: Opportunities and challenges · 2025
- (+)-Usnic Acid as a Promising Candidate for a Safe and Stable Topical Photoprotective Agent · 2021
- Optimization of usnic acid extraction conditions using fractional factorial design · 2020
- Development of Usnic Acid Embedded Eudragit Microspheres for Alleviation of Nosocomial Infections · 2020
- (+)-Usnic acid enamines with remarkable cicatrizing properties. · 2013
Linked databases 16
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic regulatory information 2 3
- PubChem 2
- 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 2