oakmoss resin

Oakmoss resin is a natural aromatic resin extracted from the lichen Evernia prunastri, which grows on oak trees. It appears as a viscous, dark-colored material with a characteristic green, sweet, and mossy odor profile. Synonyms for this resin include Oak moss resin, Evernia prunastri lichen resin, and Oakmoss resinoid. It is widely recognized in fragrance chemistry and can be found under controlled chemical vocabulary systems such as PubChem. Oakmoss resin is obtained by solvent extraction of the lichen, which itself is harvested from natural forest habitats predominantly in temperate climates. The resin forms a fundamental ingredient in perfumery, valued for its fixative and complex scent properties.

Oakmoss resin naturally occurs in the lichen Evernia prunastri, which colonizes mostly oak trees in temperate forest regions. Its applications are predominantly as a fragrance agent where it imparts green, sweet, mossy, and leathery notes. Its odor profile supports accords reminiscent of clover, new mown hay, tobacco, and Russian leather, making it a versatile component in perfumery. The International Fragrance Association (IFRA) (Global) provides usage guidelines and restrictions due to sensitization concerns. Oakmoss resin is therefore carefully formulated within fragrance compositions to balance its aesthetic qualities with safety requirements.

Oakmoss resin exhibits moderate solubility characteristics; it is soluble in dipropylene glycol and shows limited water solubility, with an estimated solubility of approximately 88.46 mg/L at 25 °C, but is generally insoluble in water in its raw form. The resin’s physicochemical traits, including its viscous texture and notable substantivity—approximately 400 hours at 20 % concentration—contribute significantly to its fixation properties in fragrance formulations. These properties influence how oakmoss resin blends with solvents and other fragrance components, affecting both the stability and release of its characteristic green and sweet aromatic notes over extended periods.

Export Tariff Code:	3301.30.0000
Wikipedia:	View

Safety information

Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Pictogram
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
Not determined
Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined

Safety in use information

Category:
fragrance agents
RIFM Fragrance Material Safety Assessment: Search
IFRA Code of Practice Notification of the 49th Amendment to the IFRA Code of Practice
IFRA Critical Effect:
Sensitization
	View the IFRA Standard
View IFRA Standards Library for complete information.
Please review Amendment 49 IFRA documentation for complete information.
IFRA RESTRICTION LIMITS IN THE FINISHED PRODUCT (%):
Category 1: Products applied to the lips
0.020 %
Category 2: Products applied to the axillae
0.016 %
Category 3: Products applied to the face/body using fingertips
0.10 %
Category 4: Products related to fine fragrance
0.10 %
	Category 5: Products applied to the face and body using the hands (palms), primarily leave-on
Category 5A: Body lotion products applied to the body using the hands (palms), primarily leave-on
0.076 %
Category 5B: Face moisturizer products applied to the face using the hands (palms), primarily leave-on
0.076 %
Category 5C: Hand cream products applied to the hands using the hands (palms), primarily leave-on
0.076 %
Category 5D: Baby Creams, baby Oils and baby talc
0.076 %
Category 6: Products with oral and lip exposure
0.18 %
	Category 7: Products applied to the hair with some hand contact
Category 7A: Rinse-off products applied to the hair with some hand contact
0.10 %
Category 7B: Leave-on products applied to the hair with some hand contact
0.10 %
Category 8: Products with significant anogenital exposure
0.032 %
Category 9: Products with body and hand exposure, primarily rinse off
0.10 %
	Category 10: Household care products with mostly hand contact
Category 10A: Household care excluding aerosol products (excluding aerosol/spray products)
0.10 %
Category 10B: Household aerosol/spray products
0.10 %
	Category 11: Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate
Category 11A: Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
0.10 %
Category 11B: Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
0.10 %
Category 12: Products not intended for direct skin contact, minimal or insignificant transfer to skin
No Restriction
	Notes:
IFRA FLAVOR REQUIREMENTS:
Due to the possible ingestion of small amounts of fragrance ingredients from their use in products in Categories 1 and 6, materials must not only comply with IFRA Standards but must also be recognized as safe as a flavoring ingredient as defined by the IOFI Code of Practice (www.iofi.org). For more details see chapter 1 of the Guidance for the use of IFRA Standards.
Recommendation for oakmoss resin flavor usage levels up to:
	not for flavor use.

Safety references

EPI System: View

EPA Substance Registry Services (TSCA):9000-50-4

EPA ACToR:Toxicology Data

EPA Substance Registry Services (SRS):Registry

National Institute of Allergy and Infectious Diseases:Data

evernia prunastri lichen resin

Chemidplus:0009000504