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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 16331Generated: October 26, 2026

Butyl levulinate

NBL · PENTANOIC ACID, 4-OXO-, BUTYL ESTER · FEMA 2207 · FEMA 22073 · Butyl levulite · BUTYLLAEVULATE · Butyl Levuhnate · Butyl leulinate

https://huagongshe.com/en/chemical/16331

Butyl levulinate molecular structure

Identifiers & Physical Properties

CAS No.2052-15-5
Molecular formulaC9H16O3
Average molar mass172.22 g/mol
Monoisotopic mass172.10994437 g/mol
SMILESCCCCOC(=O)CCC(C)=O
InChIKeyISBWNEKJSSLXOD-UHFFFAOYSA-N
PubChem CID16331
ChEMBLCHEMBL3188634
ChEBICHEBI:171935
EC No.218-143-4
DTXSIDDTXSID3038800

Chemical & Physical Properties

XLogP1
Topological polar surface area43.4
Hydrogen bond donors0
Hydrogen bond acceptors3
Rotatable bonds7
Heavy atoms12
Formal charge0
Complexity152
Density0.967-0.9770.9735 @ 20°C0.974 g/mL at 25 °C(lit.)
Solubilityslightly soluble in watersoluble in oil and alcohol(in ethanol)Slightly soluble in water.
Boiling point106.00 to 108.00 °C. @ 5.50 mm Hg238 °C237.5 °C @760 [mm Hg]106-108 °C5.5 mm Hg(lit.)
Refractive index1.423-1.433n20/D 1.427(lit.)
Physical Descriptioncolourless or straw-colored liquidsweet and slightly pungent caramellic odour with fruity undertonesmild sweet caramellic-herbaceous tastebitter taste
Kovats Retention Index12251760
Vapor pressure5Pa at 25℃
FEMA2207 | BUTYL LEVULINATE
FLAVIS Number09.436 | Butyl 4-oxovalerate
Flash point197 °F
Storage conditions2-8°C
Physical stateclear liquid
ColorColorless to Almost colorless
Specific gravity0.974
Odorat 100.00 %. fruity herbal waxy caramel savory
Odor typeherbal
Biological sourcesynthetic
JECFA Number608
Cosmetics Ingredients FunctionsSOLVENTSKIN CONDITIONING - EMOLLIENTPERFUMING
InChI1S/C9H16O3/c1-3-4-7-12-9(11)6-5-8(2)10/h3-7H2,1-2H3
InChIKeyISBWNEKJSSLXOD-UHFFFAOYSA-N
SMILESCCCCOC(=O)CCC(C)=O
LogP (partition coefficient)1.435 at 20℃
Surface tension31.37mN/m at 293.15K
Substances Added to Food (formerly EAFUS)BUTYL LEVULINATE
FDA 21 CFR172.515
CAS DataBase Reference2052-15-5(CAS DataBase Reference)
EWG's Food Scores1
FDA UNIIOI56208RTB
NIST Chemistry ReferencePentanoic acid, 4-oxo-, butyl ester(2052-15-5)
EPA Substance Registry SystemButyl levulinate (2052-15-5)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319
GHS precautionary statementsP264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313
Personal protective equipment (PPE)Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Hazard symbolsXi
Safety statements (S)24/25
Water hazard class (WGK)2
RTECS numberOI1695000
Hazard NoteIrritant
TSCA inventory statusTSCA listed
Customs code29183000
Storage class10 - Combustible liquids
Hazard classEye Irrit. 2Skin Irrit. 2
REACH registrationsActive

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 72.8% (91 of 125) of all reports.WarningH315 (27.2%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (27.2%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]P264, P264+P265, P280, P302+P352, P305+P351+P338, P321, P332+P317, P337+P317, and P362+P364 (click each P-code to see the statement)Aggregated GHS information provided per 125 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Reported as not meeting GHS hazard criteria per 91 of 125 reports by companies.There is 1 notification provided by 34 of 125 reports by companies with hazard statement code(s).Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Regulatory informationChemical: Pentanoic acid, 4-oxo-, butyl esterPentanoic acid, 4-oxo-, butyl ester is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Pentanoic acid, 4-oxo-, butyl ester are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 26-01-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/16413Pentanoic acid, 4-oxo-, butyl ester: Does not have an individual approval but may be used under an appropriate group standard
EPA Safer ChemicalChemical: Butyl levulinateGreen half-circle - The chemical is expected to be of low concern based on experimental and modeled data. Additional data would strengthen EPA's confidence in the chemical's safer status.
Hazard Classes and CategoriesSkin Irrit. 2 (27.2%)Eye Irrit. 2 (27.2%)
Protective Action Criteria (PAC)15 [mg/m3]170 [mg/m3]990 [mg/m3]
Personal protective equipment (PPE)Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Water hazard class (WGK)2
TSCA inventory statusTSCA listed
RTECS numberOI1695000
Customs code29183000
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
hazard_noteIrritant
Safety statements (S)24/25
Storage class10 - Combustible liquids
GHS hazard statementsH315-H319
REACH registrationsActive
Hazard classEye Irrit. 2Skin Irrit. 2
GHS precautionary statementsP264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313

Applications & Uses

Uses

Butyl 4-Oxopentanoate is used in preparation and application of magnetic nano-solid acid catalyst iron oxide-polydopamine-sulfonic acid

Uses

Butyl levulinate can be used in flavor compositions for imitation Butter, Rum, and in various fruit flavors, "Tutti-frutti", etc. Concentration is usually mere traces (a few ppm. ) in the finished product.