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Ingredient Dictionary

UROCANIC ACID

Urocanic acid is an alpha,beta-unsaturated monocarboxylic acid that is prop-2-enoic acid substituted by a 1H-imidazol-4-yl group at position 3.

Molecular structure

Definition

Urocanic acid is an alpha,beta-unsaturated monocarboxylic acid that is prop-2-enoic acid substituted by a 1H-imidazol-4-yl group at position 3. It is a metabolite of hidtidine. It has a role as a chromophore and a human metabolite. It is a member of imidazoles and an alpha,beta-unsaturated monocarboxylic acid. It is a conjugate acid of a urocanate.

Source: PubChem

US FDA substance register · UNII G8D26XJJ3B · registered name UROCANIC ACID · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Absorbs UV (including to protect the product)UV ABSORBER

Safety & regulatory references

Banned
Argentina · ASEAN · Brazil · Canada · China · European Union · South Korea · Taiwan

Source: ASEAN Cosmetic Directive · Health Canada Cosmetic Ingredient Hotlist · MFDS (Korea) cosmetic regulatory information

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Health Canada Cosmetic Ingredient Hotlist · prohibited in cosmetics

Source: Health Canada Cosmetic Ingredient Hotlist

Restriction II/418

Source: EU CosIng ingredient list

Reviewed by CIR: Final Report on the Safety Assessment of Urocanic Acid

Source: US Cosmetic Ingredient Review (CIR)

CIR reviewed this ingredient and flagged its status as: Insufficient data ingredients with no uses reported to FDA's Voluntary Cosmetic Registration Program (VCRP) (insufficient data or use not supported — CIR's own classification, not a full safety-as-used conclusion).

Source: US Cosmetic Ingredient Review (CIR)

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

Names & identifiers

UROCANIC ACIDINCI우로카닉애씨드Korean label name (MFDS standard)2-Propenoic acid, 3-(1H-imidazol-5-yl)-Synonym
CAS No.chemical registry number
104-98-3
EC No.EU chemical inventory number
203-258-4
DTXSIDUS EPA chemical ID
DTXSID50859181
DTXCIDUS EPA compound ID
DTXCID10809662
IUPAC
3-(1H-Imidazol-5-yl)prop-2-enoic acid
Molecular formula
C6H6N2O2
Molecular weight
138.126 g/mol

Measured properties

Appearance
Solid · solid
Melting point
225 °C
Solubility
1500 mg/L (at 17 °C) · 1.5 mg/mL at 17 °C
Melting/freezing point
217~222 ℃
Molecular weight
138.13

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)

Related literature

Linked databases 18