Crotonic acid
- CAS No.
- 3724-65-0
- Chemical Name:
- Crotonic acid
- Synonyms
- 2-BUTENOIC ACID;BUT-2-ENOIC ACID;crotonic;FEMA 3908;BUTENOIC ACID;(2E)-but-2-enoic acid;CH3CH=CHCOOH;a-butenoicacid;1-PROPENE-1-CARBOXYLIC ACID;C01771
- CBNumber:
- CB9145403
- Molecular Formula:
- C4H6O2
- Molecular Weight:
- 86.09
- MDL Number:
- MFCD00002701
- MOL File:
- 3724-65-0.mol
- MSDS File:
- SDS
| Melting point | 70-72 °C(lit.) |
|---|---|
| Boiling point | 180-181 °C(lit.) |
| Density | 1.027 g/mL at 25 °C(lit.) |
| vapor density | 2.97 (vs air) |
| vapor pressure | 0.19 mm Hg ( 20 °C) |
| refractive index | 1.4210 (estimate) |
| FEMA | 3908 | (E)-2-BUTENOIC ACID |
| FLAVIS Number | 08.072 | But-2-enoic acid (cis and trans) |
| Flash point | 190 °F |
| storage temp. | 2-8°C |
| pka | 4.80±0.10(Predicted) |
| form | Solid |
| color | Yellow |
| Odor | at 0.10 % in propylene glycol. roasted burnt |
| Odor Type | milky |
| Water Solubility | soluble |
| Henry's Law Constant | 2.3×101 mol/(m3Pa) at 25℃, Duchowicz et al. (2020) |
| Cosmetics Ingredients Functions |
FRAGRANCE LIGHT STABILIZER |
| LogP | 0.720 |
| CAS DataBase Reference | 3724-65-0(CAS DataBase Reference) |
| Substances Added to Food (formerly EAFUS) | (E)-2-BUTENOIC ACID |
| FDA 21 CFR | 175.105; 175.350; 176.170;176.180 |
| EWG's Food Scores | 1 |
| FDA UNII | YW5WZZ4O5Q |
| NIST Chemistry Reference | Crotonic acid(3724-65-0) |
| EPA Substance Registry System | Crotonic acid (3724-65-0) |
| UNSPSC Code | 12352200 |
| NACRES | NA.21 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H302-H312-H314 | |||||||||
| Precautionary statements | P264-P270-P280-P260-P301+P312-P330-P302+P352-P312-P362+P364-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P305+P351+P338-P405-P501 | |||||||||
| Hazard Codes | C | |||||||||
| Risk Statements | 21/22-34 | |||||||||
| Safety Statements | 26-36/37/39-45 | |||||||||
| RIDADR | UN 2823 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | GQ2900000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | III | |||||||||
| Storage Class | 8A - Combustible corrosive hazardous materials | |||||||||
| Hazard Classifications | Acute Tox. 4 Dermal Skin Corr. 1B |
|||||||||
| Hazardous Substances Data | 3724-65-0(Hazardous Substances Data) | |||||||||
| NFPA 704 |
|
Crotonic acid price More Price(6)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Biosynth | FC14803 | Crotonic acid | 3724-65-0 | 0.025kg | $1116.5 | 2026-06-04 | Buy |
| Biosynth | FC14803 | Crotonic acid | 3724-65-0 | 0.05kg | $1276 | 2026-06-04 | Buy |
| Biosynth | FC14803 | Crotonic acid | 3724-65-0 | 0.1kg | $1435.5 | 2026-06-04 | Buy |
| Biosynth | FC14803 | Crotonic acid | 3724-65-0 | 0.25kg | $2392.5 | 2026-06-04 | Buy |
| Biosynth | FC14803 | Crotonic acid | 3724-65-0 | 0.5kg | $3190 | 2026-06-04 | Buy |
Crotonic acid Chemical Properties, Uses, Production
Description
Crotonic acid is a white or colorless, crystalline solid with a pungent odor. May be transported as amolten liquid. Molecular weight=86.10; Boilingpoint=187-189℃; Freezing/Melting point=72℃; Flashpoint=88℃ (oc); Autoignition temperature=396℃.Hazard Identification (based on NFPA-704 M RatingSystem): Health 3, Flammability 2, Reactivity 0. Soluble inwater; solubility=9% at 25℃. This chemical is the commercially used trans-isomer. The cis-isomer is lessstable and melts at 15℃.
Chemical Properties
Crotonic acid is a white or colorless, crystalline solid with a pungent odor. May be transported as a molten liquid.
Uses
Synthesis of resins, polymers, plasticizers, drugs.
Uses
Crotonic acid is used in the synthesis of resins, polymers, plasticizers, and drugs. It is also used as a softening agent for synthetic rubber and in medicinal chemicals.
Definition
Exists in cis and trans isomeric forms, the latter being the stable isomer used commercially. The cis form melts at 15C and is sometimes called isocrotonic acid.
General Description
A white crystalline solid. Shipped as either a solid or liquid. Melting point 59°F. Soluble in water and less dense than water. Flash point 190°F. Corrosive to metals and tissue.
Air & Water Reactions
Soluble in water.
Reactivity Profile
Crotonic acid is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Crotonic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.
Hazard
Strong irritant to tissue.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Safety Profile
Poison by intraperitoneal route. Moderately toxic by ingestion, skin contact, and subcutaneous routes. A powerful corrosive and irritant. Flammable when exposed to heat or flame; can react with oxidizing materials. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.
Potential Exposure
Used to make plastics, resins, plasticizers, lacquers, and medicines; other chemicals as a chemical intermediate.
First aid
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek med_x0002_ical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. If victim is conscious, administer water ormilk. Do not induce vomiting. Medical observation isrecommended for 24-48 h after breathing overexposure, aspulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consideradministering a corticosteroid spray.
with soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. If victim is conscious, administer water ormilk. Do not induce vomiting. Medical observation isrecommended for 24-48 h after breathing overexposure, aspulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consideradministering a corticosteroid spray.
storage
(1) Color Code—White: Corrosive or ContactHazard; Store separately in a corrosion-resistant location.(2) Color Code—Yellow Stripe (strong reducing agent):Reactivity Hazard; Store separately in an area isolated fromflammables, combustibles, or other yellow-coded materials.(3) Color Code—Blue: Health Hazard/Poison: Store in asecure poison location. Prior to working with crotonic acid,you should be trained on its proper handling and storage.Store in tightly closed containers in a cool, well-ventilatedarea away from oxidizers, strong bases, and reducingagents. Where possible, automatically pump liquid fromdrums or other storage containers to process containers
Shipping
UN2823 Crotonic acid, solid, Hazard class: 8; Labels: 8-Corrosive material.
Incompatibilities
May form explosive mixture with air. A strong reducing agent. The aqueous solution is a weak acid. Violent reaction with oxidizers, combustibles, strong bases; peroxides. Moisture or strong sunlight (UV) may cause explosive polymerization. May accumulate static electrical charges, and may cause ignition of its vapors. Combustible when exposed to heat or flame. Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water, and a salt that may be harmful. Incompatible with arsenic compounds 938 Crotonic Acid (releases hydrogen cyanide gas), diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, sulfides (releasing heat, toxic, and possibly flammable gases), thiosulfates, and dithionites (releasing hydrogen sulfate and oxides of sulfur).
Crotonic acid Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
1of3
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Yangzhou juhechang Technology Co., Ltd | 0514-0514-83662002 13073488988 | 13073488988@163.com | China | 40 | 58 |
| Shandong Hima Supply chain Management Co., LTD | 0533-13011607593; 13011607593 | 904987017@qq.com | China | 296 | 58 |
| ShangHai DEMO Chemical Co.,Ltd | 400-021-7337 2355568890 | sales@demochem.com | China | 2569 | 57 |
| Shijiazhuang Sdyano Fine Chemical Co., Ltd. | 0311-89250318 13582355795 | master@sjzsdyn.com | China | 2776 | 65 |
| JinYan Chemicals(ShangHai) Co.,Ltd. | 13817811078 | sales@jingyan-chemical.com | China | 9963 | 60 |
| Nanjing Vital Chemical Co., Ltd. | Please Send Email 18652950785 | chemweiao@163.com | China | 4368 | 65 |
| Aemon Chemical | 0086-755-86198205 | acinfo@aemonchem.com | China | 1928 | 57 |
| Nanjing Rate Biochemicals CO., LTD. | +86-(0)25-84931986,(0)18951962398 | China | 70 | 62 | |
| Springchem New Material Technology Co.,Limited | +86-021-62885108 | info@spring-chem.com | China | 2068 | 57 |
| Spectrum Chemical Manufacturing Corp. | 021-021-021-67601398-809-809-809 15221380277 | marketing_china@spectrumchemical.com | China | 9643 | 60 |
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View Latest Price from Crotonic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-02 | crotonic acid
3724-65-0
|
20kg | 99% | 20 tons | Qingdao RENAS Polymer Material Co., Ltd. | ||
 |
2026-03-20 | Crotonic acid
3724-65-0
|
$10.00 | 1kg | 99% | 100 mt | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2022-02-25 | Crotonic acid
3724-65-0
|
$32.50 | 1KG | 99% | 100kg | Hong Kong Tiansheng New Material Trading Co., Ltd |
-
- crotonic acid
3724-65-0
- $0.00
- 99%
- Qingdao RENAS Polymer Material Co., Ltd.
-
- Crotonic acid
3724-65-0
- $10.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Crotonic acid
3724-65-0
- $32.50
- 99%
- Hong Kong Tiansheng New Material Trading Co., Ltd
