Ethyl cyanoacetate (CAS No.105-56-6) is both a nitrile and an ester.
  As esters , it can react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. Nitriles may polymerize in the presence of metals and some metal compounds. They are incompatible with acids; mixing nitriles with strong oxidizing acids can lead to extremely violent reactions.
  As nitriles Ethyl cyanoacetate (CAS No.105-56-6) is generally incompatible with other oxidizing agents such as peroxides and epoxides. The combination of bases and nitriles can produce hydrogen cyanide. Nitriles are hydrolyzed in both aqueous acid and base to give carboxylic acids (or salts of carboxylic acids). These reactions generate heat. Peroxides convert nitriles to amides. Nitriles can react vigorously with reducing agents. Acetonitrile and propionitrile are soluble in water, but nitriles higher than propionitrile have low aqueous solubility. They are also insoluble in aqueous acids.

The CAS registry number of Ethyl cyanoacetate is 105-56-6. Its EINECS registry number is 203-309-0. The IUPAC name is ethyl 2-cyanoacetate. In addition, the molecular formula is C₅H₇NO₂ and the molecular weight is 113.11. What's more, it belongs to the classes of Pharmaceutical Intermediates; EQ - EZ Analytical Standards; Esters Analytical Standards; Nitriles; Volatiles/ Semivolatiles. It can be used as intermediates in the preparation of vitamin B6 and caffeine. Besides, it also can be used as raw materials for organic synthesis.

Physical properties about this chemical are: (1)ACD/LogP: 0.06; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 1; (5)ACD/KOC (pH 7.4): 1; (6)#H bond acceptors: 3; (7)#Freely Rotating Bonds: 3; (8)Polar Surface Area: 50.09 Å²; (9)Index of Refraction: 1.412; (10)Molar Refractivity: 26.9 cm³; (11)Molar Volume: 107.9 cm³; (12)Polarizability: 10.66 ×10^-24cm³; (13)Surface Tension: 35.8 dyne/cm; (14)Density: 1.047 g/cm³; (15)Flash Point: 84.1 °C; (16)Enthalpy of Vaporization: 43.99 kJ/mol; (17)Boiling Point: 203.6 °C at 760 mmHg; (18)Vapour Pressure: 0.275 mmHg at 25°C .

Preparation of Ethyl cyanoacetate: it can be prepared by ethyl chloroacetate and sodium cyanide. The ethyl chloroacetate can be obtained by chloroacetic acid and ethanol through esterification reaction. The equation is as follows:

Uses of Ethyl cyanoacetate: it can react with 2-hydroxy-benzaldehyde to get 2-imino-2H-chromene-3-carboxylic acid ethyl ester. This reaction will need catalyst AlPO₄-Al₂O₃. The reaction time is 1 hour with ambient temperature. The yield is about 58%.

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful by inhalation, in contact with skin and if swallowed. It is irritating to eyes, respiratory system and skin. When you are using it, wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: N#CCC(=O)OCC
(2)InChI: InChI=1/C5H7NO2/c1-2-8-5(7)3-4-6/h2-3H2,1H3
(3)InChIKey: ZIUSEGSNTOUIPT-UHFFFAOYAI

The toxicity data is as follows: