Ingredient Dictionary

5-METHYLFURANONE

Alpha-angelica lactone is an angelica lactone and a butenolide.

Definition

Alpha-angelica lactone is an angelica lactone and a butenolide. It is functionally related to a but-3-en-4-olide. It is a tautomer of a beta-angelica lactone.

Source: PubChem

US FDA substance register · UNII 29CRF6L9C5 · registered name 4-HYDROXY-3-PENTENOIC ACID.GAMMA.-LACTONE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Gives the product a scentPERFUMING

More data — names, identifiers, properties, test records, literature

Names & identifiers

5-METHYLFURANONEINCI2(3H)-Furanone, 5-methyl-Synonym

CAS No.chemical registry number: 591-12-8
EC No.EU chemical inventory number: 209-701-8
DTXSIDUS EPA chemical ID: DTXSID7047693
DTXCIDUS EPA compound ID: DTXCID5027693

IUPAC: 5-Methylfuran-2(3H)-one
Molecular formula: C5H6O2
Molecular weight: 98.101 g/mol

Measured properties

Appearance: liquid
Melting/freezing point: 13 ℃
Initial boiling point and range: 58 ℃
Flash point: 68 ℃
Vapour pressure: 0.02 ㎜Hg(@ 25 ℃)
Vapour density: 3.38
Relative density: 1.09
n-Octanol/water partition coefficient (Kow): 0.84
Molecular weight: 98.0999

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 4 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.

Fragrance2
Flavouring and nutrient2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 1 eye studies are on record.

Classed as moderate1

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 4 studies

SkinSens1
Skin Sensitization · QSAR Predicted
Classification not possible
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Classification not possible
Eye Irritation · Screening