The IUPAC name of Ethoxymethylenemalonic acid, ethyl ester is diethyl 2-(ethoxymethylidene)propanedioate. With the CAS registry number 87-13-8, it is also named as Propanedioic acid, (ethoxymethylene)-, diethyl ester; Diethyl (ethoxymethylidene)propanedioate. The product's categories are pharmaceutical intermediates, carbonyl compounds and esters. In addition, it is clear colourless to light yellow liquid which is insoluble in water.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 1.44; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.44; (4)ACD/LogD (pH 7.4): 1.44; (5)ACD/BCF (pH 5.5): 7.26; (6)ACD/BCF (pH 7.4): 7.26; (7)ACD/KOC (pH 5.5): 143.88; (8)ACD/KOC (pH 7.4): 143.88; (9)#H bond acceptors: 5; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 8; (12)Index of Refraction: 1.447; (13)Molar Refractivity: 53.57 cm³; (14)Molar Volume: 200.3 cm³; (15)Polarizability: 21.23×10^-24 cm³; (16)Surface Tension: 33.6 dyne/cm; (17)Enthalpy of Vaporization: 51.87 kJ/mol; (18)Vapour Pressure: 0.00388 mmHg at 25°C; (19)Rotatable Bond Count: 8; (20)Exact Mass: 216.099774; (21)MonoIsotopic Mass: 216.099774; (22)Topological Polar Surface Area: 61.8; (23)Heavy Atom Count: 15.

Preparation of Ethoxymethylenemalonic acid, ethyl ester: It can be obtained by triethoxymethane and malonic acid diethyl ester with the reagent acetic acid anhydride and ZnCl.
 

Uses of Ethoxymethylenemalonic acid, ethyl ester: It is an important organic raw materials and it is now mainly used for synthesis of gatifloxacin. For example: It can react with 6-methyl-pyridin-2-ylamine to get [(6-methyl-pyridin-2-ylamino)-methylene]-malonic acid diethyl ester. The reaction temperature is 110 °C.

  

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

People can use the following data to convert to the molecule structure. 
1. SMILES: O=C(OCC)\C(=C\OCC)C(=O)OCC;
2. InChI: InChI=1/C10H16O5/c1-4-13-7-8(9(11)14-5-2)10(12)15-6-3/h7H,4-6H2,1-3H3.

The following are the toxicity data which has been tested.