Crotonic acid
- CAS No.
- 107-93-7
- Chemical Name:
- Crotonic acid
- Synonyms
- (E)-But-2-enoic acid;Crotonate;BUTENOIC ACID;BUT-2-ENOIC ACID;TRANS-CROTONIC ACID;(E)-2-BUTENOIC ACID;2-Butenoic acid, (E)-;FEMA 3908;(2E)-2-Butenoic acid;NSC 8751
- CBNumber:
- CB6145402
- Molecular Formula:
- C4H6O2
- Molecular Weight:
- 86.09
- MDL Number:
- MFCD00002701
- MOL File:
- 107-93-7.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 70-72 °C (lit.) |
|---|---|
| Boiling point | 180-181 °C (lit.) |
| Density | 1.027 g/mL at 25 °C (lit.) |
| bulk density | 543kg/m3 |
| vapor density | 2.97 (vs air) |
| vapor pressure | 0.19 mm Hg ( 20 °C) |
| refractive index | 1.4228 |
| FEMA | 3908 | (E)-2-BUTENOIC ACID |
| Flash point | 190 °F |
| storage temp. | Store below +30°C. |
| solubility | H2O: soluble |
| pka | 4.69(at 25℃) |
| form | Crystalline Flakes |
| color | White to light yellow |
| PH | 3 (10g/l, H2O, 20℃) |
| Odor | at 1.00 %. milky |
| Odor Type | milky |
| explosive limit | 15.1%, 171°F |
| Water Solubility | 94 g/L (25 ºC) |
| Merck | 14,2597 |
| JECFA Number | 1371 |
| BRN | 1719943 |
| Henry's Law Constant | 4.1×101 mol/(m3Pa) at 25℃, HSDB (2015) |
| InChI | 1S/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6)/b3-2+ |
| InChIKey | LDHQCZJRKDOVOX-NSCUHMNNSA-N |
| SMILES | [H]\C(C)=C(\[H])C(O)=O |
| LogP | 0.85 at 25℃ |
| FDA 21 CFR | 176.180 |
| CAS DataBase Reference | 107-93-7(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | YW5WZZ4O5Q |
| NIST Chemistry Reference | Crotonic acid(107-93-7) |
| EPA Substance Registry System | 2-Butenoic acid, (2E)- (107-93-7) |
| UNSPSC Code | 12352106 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS05 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H318 | |||||||||
| Precautionary statements | P280-P305+P351+P338 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | C,N,Xi | |||||||||
| Risk Statements | 21/22-34-50/53-36/37/38 | |||||||||
| Safety Statements | 26-36/37/39-45-61-37/39 | |||||||||
| RIDADR | UN 2823 8/PG III (CROTONIC ACID, SOLID) | |||||||||
| RIDADR | UN 3472 8/PG III (CROTONIC ACID, LIQUID) | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | GQ2900000 | |||||||||
| Autoignition Temperature | 744 °F | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 29161940 | |||||||||
| Storage Class | 8A - Combustible corrosive hazardous materials | |||||||||
| Hazard Classifications | Eye Dam. 1 | |||||||||
| Toxicity | LD50 orally in rats: 1.0 g/kg (Smyth, Carpenter) | |||||||||
| REACH Registrations | Active | |||||||||
| Limited Quantities | 5.0 L (1.3 gallons) (liquid) or 5.0 kg (11 lbs) (solid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L) | |||||||||
| NFPA 704 |
|
Crotonic acid price More Price(59)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 113018 | Crotonic acid 98% | 107-93-7 | 500g | $63.5 | 2026-04-30 | Buy |
| Sigma-Aldrich | 113018 | Crotonic acid 98% | 107-93-7 | 3kg | $340 | 2026-04-30 | Buy |
| TCI Chemical | C0416 | Crotonic Acid >98.0%(GC)(T) | 107-93-7 | 25g | $44 | 2026-04-30 | Buy |
| TCI Chemical | C0416 | Crotonic Acid >98.0%(GC)(T) | 107-93-7 | 100g | $99 | 2026-04-30 | Buy |
| Cayman Chemical | 43903 | Crotonic Acid ≥95% | 107-93-7 | 10mg | $39 | 2026-04-30 | Buy |
Crotonic acid Chemical Properties, Uses, Production
Chemical Properties
Crotonic acid is a white to light yellow crystalline flakes with a pungent odor. It is moderately soluble in water but highly soluble in organic solvents such as ethanol and ether.
Uses
trans-Crotonic acid is used in the copolymerization of crotonic acid hydrogel systems by using gamma-rays. The crosslinked copolymeric crotonic acid hydrogels release fertilizers and drugs that help to prevent environmental pollution.
Preparation
(E)-2-Butenoic acid may be formed by oxidation of crotonaldehyde, 2-butenal. If (Z)-butenoic acid is heated at 180°C, it is converted to (E)-2-butenoid acid.
Definition
ChEBI: Crotonic acid is a but-2-enoic acid with a trans- double bond at C-2. It has been isolated from Daucus carota. It has a role as a plant metabolite. It is a conjugate acid of a crotonate.
Application
Crotonic acid is an unsaturated fatty acid containing a double bond and a carboxyl group in its molecular structure, rendering it highly reactive. It serves various industrial applications, primarily in the preparation of resins, fungicides, surface coatings, plasticisers, and pharmaceuticals.
General Description
Crotonic acid undergoes esterification with butan-2-ol by following second order reaction kinetics.
Flammability and Explosibility
Not classified
storage
Store at RT
Purification Methods
Distil the acid under reduced pressure and/or recrystallise it from pet ether (b 60-80o) or water, or by partial freezing of the melt. [Beilstein 2 IV 1498.]
References
[1] VAHIDEH ELHAMI Mark A H, BOELO SCHUUR* Crotonic Acid Production by Pyrolysis and Vapor Fractionation of Mixed Microbial Culture-Based Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)[J]. Industrial & Engineering Chemistry Research, 2023, 62 2: 916-923. DOI:10.1021/acs.iecr.2c03791.
[2] ZHIQUN YU*, JIADI ZHOU Continuous Flow Synthesis of Crotonic Acid from Crotonaldehyde[J]. Organic Process Research & Development, 2024, 28 5: 1773-1782. DOI:10.1021/acs.oprd.3c00376.
[3] KANG S, CHEN R, FU J, et al. Catalyst-free valorization of poly-3-hydroxybutyrate to crotonic acid†[J]. Reaction Chemistry & Engineering, 2021, 10: 1791-1795. DOI:10.1039/D1RE00273B.
Crotonic acid Preparation Products And Raw materials
Raw materials
Preparation Products
1of3
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hefei Qianhang Pharmaceutical Technology Co., Ltd. | 13346199520 | 1356223173@qq.com | China | 61 | 58 |
| Shanghai Rong Tang Polymer Material Co. , Ltd. | 18701991744 | 18701991744@163.com | China | 64 | 58 |
| Wuhan Hongfuda New Materials Co., Ltd. | 19107255884 19107255884 | 2013537414@qq.com | China | 494 | 58 |
| Yangzhou juhechang Technology Co., Ltd | 0514-0514-83662002 13073488988 | 13073488988@163.com | China | 40 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Beijing dtftchem Technology Co., Ltd. | 010-60275820 13031183356 | elainezt@sina.com | China | 1386 | 62 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
View Latest Price from Crotonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-08-07 | Crotonic acid
107-93-7
|
$1.00 | 1KG | 99%+ | 10000KG | Shaanxi Dideu Medichem Co. Ltd | |
 |
2026-06-30 | TRANS-2-BUTENOIC ACID
107-93-7
|
1kg | 99% | 10000KGS | Shaanxi Dideu New Materials Co. Ltd | ||
 |
2026-03-20 | Crotonic acid
107-93-7
|
$10.00 | 1KG | 99% | 10 mt | Hebei Chuanghai Biotechnology Co., Ltd |
-
- Crotonic acid
107-93-7
- $1.00
- 99%+
- Shaanxi Dideu Medichem Co. Ltd
-
- TRANS-2-BUTENOIC ACID
107-93-7
- $0.00
- 99%
- Shaanxi Dideu New Materials Co. Ltd
-
- Crotonic acid
107-93-7
- $10.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
