This chemical is called 3,4-Thiophenedicarboxaldehyde, and its systematic name is Thiophene-3,4-dicarbaldehyde. With the molecular formula of C₆H₄O₂S, its molecular weight is 140.16. The CAS registry number of the chemical is 1073-31-0. 

Other characteristics of 3,4-Thiophenedicarboxaldehyde can be summarised as followings: (1)ACD/LogP: -0.26; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 17; (6)ACD/KOC (pH 7.4): 17; (7)#H bond acceptors: 2; (8)#H bond donors: 0; (9)#Freely Rotating Bonds: 2; (10)Polar Surface Area: 62.38 Å²; (11)Index of Refraction: 1.669; (12)Molar Refractivity: 38.143 cm³; (13)Molar Volume: 102.245 cm³; (14)Polarizability: 15.121×10^-24cm³; (15)Surface Tension: 56.686 dyne/cm; (16)Density: 1.371 g/cm³; (17)Flash Point: 131.539 °C; (18)Enthalpy of Vaporization: 53.349 kJ/mol; (19)Boiling Point: 293.888 °C at 760 mmHg; (20)Vapour Pressure: 0.002 mmHg at 25°C.

You can still convert the following datas into molecular structure:
1.SMILES: c1c(c(cs1)C=O)C=O
2.InChI: InChI=1/C6H4O2S/c7-1-5-3-9-4-6(5)2-8/h1-4H
3.InChIKey: GCYSRLXIEWTZNM-UHFFFAOYAZ
4.Std. InChI: InChI=1S/C6H4O2S/c7-1-5-3-9-4-6(5)2-8/h1-4H
5.Std. InChIKey: GCYSRLXIEWTZNM-UHFFFAOYSA-N