Molecule structure of 4,5-Dibromothiophene-2-sulphonyl chloride (CAS NO.81606-31-7):

IUPAC Name: 4,5-Dibromothiophene-2-sulfonyl chloride 
Molecular Weight: 340.44054 [g/mol]
Molecular Formula: C₄HBr₂ClO₂S₂ 
Index of Refraction: 1.65
Molar Refractivity: 53.98 cm³
Molar Volume: 147.9 cm³
Surface Tension: 58.5 dyne/cm
Density: 2.301 g/cm³ 
Melting Point: 71-75 °C
Flash Point: 179.6 °C
Enthalpy of Vaporization: 59.63 kJ/mol
Boiling Point: 373.4 °C at 760 mmHg
Vapour Pressure: 1.93E-05 mmHg at 25 °C 
Sensitive: moisture sensitive
XLogP3-AA: 3.7
H-Bond Acceptor: 2
Rotatable Bond Count: 1
Exact Mass: 339.745277
MonoIsotopic Mass: 337.747324
Topological Polar Surface Area: 34.1
Heavy Atom Count: 11
Canonical SMILES: C1=C(SC(=C1Br)Br)S(=O)(=O)Cl
InChI: InChI=1S/C4HBr2ClO2S2/c5-2-1-3(10-4(2)6)11(7,8)9/h1H
InChIKey: WJYGHWXWQSCONR-UHFFFAOYSA-N

Hazard Codes: C
Risk Statements: 34 
R34:Causes burns.
Safety Statements: 45-36/37/39-26 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: 3261
Hazard Note: Corrosive
HazardClass: 8
PackingGroup: II 

 4,5-Dibromothiophene-2-sulphonyl chloride (CAS NO.81606-31-7) is also named as 2-Thiophenesulfonyl chloride, 4,5-dibromo- ; 4,5-Dibromothiophene-2-sulfonyl chloride ; 2,3-Dibromothiophene-5-sulfonyl chloride . 4,5-Dibromothiophene-2-sulphonyl chloride (CAS NO.81606-31-7) is yellow crystalline powder.