Reported in EPA TSCA Inventory.

DOT Classification:  3; Label: Flammable Liquid

The Ethyl (E)-crotonate, with the CAS registry number 623-70-1, is also known as 2-Butenoic acid, ethylester, (2E)-. It belongs to the product categories of C6 to C7; Carbonyl Compounds; Esters. Its EINECS number is 210-808-7. This chemical's molecular formula is C₆H₁₀O₂ and molecular weight is 114.14. What's more, its systematic name is Ethyl (2E)-2-butenoate. Its classification code is Skin / Eye Irritant. It should be sealed and stored in a cool and dry place. Moreover, it should be protected from oxides, heat, water and moisture. It is used as an organic synthesis intermediates, and it can be also used as paint and coating softener and solvent of cellulose ester.

Physical properties of Ethyl (E)-crotonate are: (1)ACD/LogP: 1.806; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.81; (4)ACD/LogD (pH 7.4): 1.81; (5)ACD/BCF (pH 5.5): 13.89; (6)ACD/BCF (pH 7.4): 13.89; (7)ACD/KOC (pH 5.5): 228.88; (8)ACD/KOC (pH 7.4): 228.88; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 26.3 Å²; (13)Index of Refraction: 1.422; (14)Molar Refractivity: 31.679 cm³; (15)Molar Volume: 124.673 cm³; (16)Polarizability: 12.558×10^-24cm³; (17)Surface Tension: 26.48 dyne/cm; (18)Density: 0.916 g/cm³; (19)Flash Point: 28.333 °C; (20)Enthalpy of Vaporization: 37.532 kJ/mol; (21)Boiling Point: 137.999 °C at 760 mmHg; (22)Vapour Pressure: 6.87 mmHg at 25°C.

Preparation: this chemical can be prepared by acetic acid ethyl ester and but-2-enoic acid at the ambient temperature. This reaction will need reagent iron (III) perchlorate (ITP) with the reaction time of 2 hours. The yield is about 60%.

Uses of Ethyl (E)-crotonate: it can be used to produce 5-butyl-3-methyl-dihydro-furan-2-one at the temperature of 0 °C. It will need reagents SmI₂, t-BuOH and solvent tetrahydrofuran with the reaction time of 10 hours. The yield is about 70%.

When you are using this chemical, please be cautious about it as the following:
It is highly flammable, so you should keep it away from sources of ignition - No smoking. It is irritating to eyes and can cause burns. You need to keep the container in a well-ventilated place and take precautionary measures against static discharges. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need to wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, you must seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(OCC)/C=C/C
(2)Std. InChI: InChI=1S/C6H10O2/c1-3-5-6(7)8-4-2/h3,5H,4H2,1-2H3/b5-3+
(3)Std. InChIKey: ZFDIRQKJPRINOQ-HWKANZROSA-N

The toxicity data is as follows: