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| Crotonic acid Basic information |
| Product Name: | Crotonic acid | | Synonyms: | TRANS-2-BUTENOIC ACID;TRANS-CROTONIC ACID;(2E)-2-Butenoic acid;(e)-2-butenoicaci;(E)-CH3CH=CHCOOH;(E)-Crotonic acid;(e)-crotonicaci;(e)-crotonicacid | | CAS: | 107-93-7 | | MF: | C4H6O2 | | MW: | 86.09 | | EINECS: | 203-533-9 | | Product Categories: | organic chemical | | Mol File: | 107-93-7.mol |
| Crotonic acid Chemical Properties |
| 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 | 1.4228 | | FEMA | 3908 | (E)-2-BUTENOIC ACID | | Fp | 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℃) | | explosive limit | 15.1%, 171°F | | Water Solubility | 94 g/L (25 ºC) | | Merck | 14,2597 | | JECFA Number | 1371 | | BRN | 1719943 | | InChIKey | LDHQCZJRKDOVOX-NSCUHMNNSA-N | | LogP | 0.85 at 25℃ | | CAS DataBase Reference | 107-93-7(CAS DataBase Reference) | | NIST Chemistry Reference | Crotonic acid(107-93-7) | | EPA Substance Registry System | 2-Butenoic acid, (2E)- (107-93-7) |
| 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 3 | | WGK Germany | 3 | | RTECS | GQ2900000 | | Autoignition Temperature | 744 °F | | HazardClass | 8 | | PackingGroup | III | | HS Code | 29161940 | | Toxicity | LD50 orally in rats: 1.0 g/kg (Smyth, Carpenter) |
| Crotonic acid Usage And Synthesis |
| Chemical Properties | White to light yellow crystalline flakes | | Chemical Properties | 2-Butenoic acid is a crystalline compound with a pungent odor. | | 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. | | General Description | Crotonic acid undergoes esterification with butan-2-ol by following second order reaction kinetics. | | Flammability and Explosibility | Notclassified | | 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.] |
| Crotonic acid Preparation Products And Raw materials |
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