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| IUPAC name : | but-2-enoic acid |
| InChI : | InChI=1/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6) |
| InChIKey : | LDHQCZJRKDOVOX-UHFFFAOYAC |
| SMILES : | CC=CC(=O)O |
| cas number : | 3724-65-0 |
| (EINECS) number : | 223-077-4 |
| beilstein number : | 1098434 |
| fema number : | 3908 |
| coe number : | 10080 |
| fl. number : | 08.072 |
| molar refractivity : | 22.20 ± 0.3 cm3 |
| parachor : | 200.2 ± 4.0 cm3 |
| index of refraction : | 1.448 ± 0.02 |
| surface tension : | 34.2 ± 3.0 dyne/cm |
| density : | 1.039 ± 0.06 g/cm3 |
| polarizability : | 8.80 ± 0.5 10-24cm3 |
| XlogP : | 0.70 |
| XlogP3 : | 0.70 |
| molecular weight : | 86.0892400 (IUPAC) |
| formula : | C4 H6 O2 |
| NMR Predictor : | Predict |
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| export tariff code : | unspecified |
| fda reg : | 175.105 175.350 176.170 176.180 |
Suppliers :
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| Frutarom : | 2-BUTENOIC ACID (CROTONIC ACID)
≥99.00%, NI, Kosher Odor: Roast, Burnt Suggested Uses: Bread, Coffee, Tropical Fruits |
| Godavari : | Crotonic Acid
99% |
| Inoue : | CROTONIC ACID
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| Nanjing : | crotonic acid
orders in chinese only. |
| Penta : | crotonic acid
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| Pfaltz & Bauer : | Crotonic acid
99% |
organoleptics :
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| odor type : | burnt |
| odor strength : | high , recommend smelling in a 0.10 % solution or less |
odor description: at 0.10 % in propylene glycol. | roasted burnt |
properties :
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| appearence : | white solid |
| assay : | 99.00 to 100.00 % sum of isomers
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| Food Chemicals Codex Listed : | No |
| melting point : | 71.00 to 73.00 °C. @ 760.00 mm Hg
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| boiling point : | 184.00 to 185.00 °C. @ 760.00 mm Hg
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| boiling point : | 66.00 to 67.00 °C. @ 10.00 mm Hg
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| vapor density : | 2.9 ( Air = 1 ) |
| flash point : | 186.00 °F. TCC ( 85.56 °C. )
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| logP (o/w) : | 0.72 |
safety :
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| most important hazard(s) : | Xn - Harmful. |
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R 20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R 34 - Causes burns. S 02 - Keep out of the reach of children. S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S 27 - Take off immediately all contaminated clothing. S 28 - After contact with skin, wash immediately with plenty of water. S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
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| Oral Toxicity(LD50) : | |
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Oral-Rat 1000.00 mg/kg Journal of Industrial Hygiene and Toxicology. Vol. 26, Pg. 269, 1944.
Oral-Mouse 4800.00 mg/kg Biochemical Journal. Vol. 34, Pg. 1196, 1940.
Intraperitoneal-Mouse 25.00 mg/kg
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| Dermal Toxicity(LD50) : | |
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Skin-Rabbit 600.00 mg/kg Journal of Industrial Hygiene and Toxicology. Vol. 26, Pg. 269, 1944.
Subcutaneous-Mouse 3590.00 mg/kg Journal of Pharmacy and Pharmacology. Vol. 21, Pg. 85, 1969.
Skin-Guineapig 200.00 mg/kg
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| Inhalation Toxicity(LC50) : | |
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Not determined
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safety in use :
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| Category : | flavoring agents |
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| recommendation for 2-butenoic acid fragrance usage levels up to : |
| | not for fragrance use.
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safety references :
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| EPI System : | view |
| NIOSH International Chemical Safety Cards : | search |
| NLM Hazardous Substances Data Bank : | search |
| Env. Mutagen Info. Center : | Search |
| Canada Domestic Sub. List : | Yes |
| EPA Chem. Sub. Inventory : | Yes |
| WISER : | UN 2823 |
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| WGK Germany : | 3 |
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| | but-2-enoic acid |
| (EINECS) number : | 223-077-4 |
| RTECS : | 3724-65-0 |
| chemidplus : | 003724650 |
| EPA/NOAA CAMEO : | hazardous materials |
| EPA Substance Registry Services : | 3724-65-0 |
references :
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| | but-2-enoic acid |
| fl. number : | 08.072 |
| NIST Chemistry WebBook : | 3016727019 |
| pubchem : | 10520625 |
Cosmetics :
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| Cosmetic uses : |
masking agents
stabilising agents
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other :
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| CosIng : | cosmetic data |
| VCF-Online: | VCF Volatile Compounds in Food |
| FDA Everything Added to Food in the United States (EAFUS) | View |