IUPAC Name: 2,5-Dichlorobenzenesulfonyl chloride
Synonyms of 2,5-Dichlorobenzenesulphonyl chloride (CAS NO.5402-73-3) : Benzenesulfonyl chloride, 2,5-dichloro- ; 2, 5-Dichlorobenzenesulfonyl chloride ; 2,5-Dichlorobenzene-1-Sulfonyl Chloride
CAS NO:5402-73-3
Molecular Formula:C₆H₃Cl₃O₂S
Molecular Weight :245.51
Molecular Structure :
EINECS: 226-453-6 
H bond acceptors: 2
H bond donors: 0
Freely Rotating Bonds: 1
Polar Surface Area: 42.52 Å²
Index of Refraction: 1.581
Molar Refractivity: 50.05 cm³
Molar Volume: 149.9 cm³
Surface Tension: 48.8 dyne/cm
Density: 1.636 g/cm³
Flash Point: 151.9 °C
Enthalpy of Vaporization: 54.72 kJ/mol
Boiling Point: 327.6 °C at 760 mmHg
Vapour Pressure: 0.000383 mmHg at 25°C 
Melting point: 36-37 °C(lit.)
Sensitive: Moisture Sensitive
Appearance: beige crystalline powder.
SMILES: O=S(Cl)(=O)c1cc(Cl)ccc1Cl
InChI: InChI=1/C6H3Cl3O2S/c7-4-1-2-5(8)6(3-4)12(9,10)11/h1-3H
InChIKey: BXCOSWRSIISQSL-UHFFFAOYAD
Std. InChI: InChI=1S/C6H3Cl3O2S/c7-4-1-2-5(8)6(3-4)12(9,10)11/h1-3H
Std. InChIKey: BXCOSWRSIISQSL-UHFFFAOYSA-N
Product Categories of 2,5-Dichlorobenzenesulphonyl chloride (CAS NO.5402-73-3): Benzenesulfonyl chloride;Organic Building Blocks;Sulfonyl Halides;Sulfur Compounds

Hazard Codes: C
Risk Statements: 34-36/37
R34: 2,5-Dichlorobenzenesulphonyl chloride (CAS NO.5402-73-3) can causes burns. 
R36/37: Irritating to eyes and respiratory system.
Safety Statements: 26-27-28-36/37/39-45
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27: Take off immediately all contaminated clothing. 
S28: After contact with skin, wash immediately with plenty of soap-suds. 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 3261 8/PG 2
WGK Germany: 3
Hazard Note: Corrosive
TSCA: T
HazardClass: 8
PackingGroup: II