2-Butenoic acid, ethyl ester
Ethyl crotonate appears as a clear colorless liquid with a pungent odor. Less dense than water and insoluble in water. Vapors heavier than air. — CAMEO Chemicals
- IUPAC name
- ethyl but-2-enoate
- Molecular formula
- C6H10O2
- Molecular weight
- 114.14 g/mol
- Exact mass
- 114.068079557 Da
- XLogP3
- 1.3
- Topological polar surface area
- 26.3 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 2
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
1 more reported name
External database identifiers
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Boiling Point: 136-137 °C Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Density: 0.916-0.921 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Physical Description: Ethyl crotonate appears as a clear colorless liquid with a pungent odor. Less dense than water and insoluble in water. Vapors heavier than air. Source: CAMEO Chemicals
- Physical Description: Colorless liquid with a pungent odor; [CAMEO] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Physical Description: Colourless liquid; Powerful sour caramellic-fruity aroma Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Refractive Index: 1.422-1.428 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: Insoluble in water; soluble in oils Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- Solubility: Soluble (in ethanol) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
- First Aid: Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious)]:; Refer to the "General First Aid" section. Specific First Aid: Wash skin with soap and water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. (ERG, 2024) Source: CAMEO Chemicals
- Signal: Warning Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H226 (99.7%): Flammable liquid and vapor [Warning Flammable liquids]; H319 (> 99.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P264+P265, P280, P303+P361+P353, P305+P351+P338, P337+P317, P370+P378, P403+P235, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 1551 reports by companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; 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. Source: European Chemicals Agency (ECHA)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| EMBL-EBI ChEBI | No exact record | 2026-08-31 |
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.