IUPAC Name: 4-Methyl-N-(oxomethylidene)benzenesulfonamide 
Synonyms of p-Toluene sulphonyl isocyanate (CAS NO.4083-64-1): EINECS 223-810-8 ; Benzenesulfonyl isocyanate, 4-methyl- ; p-Toluenesulphonyl isocyanate ; p-Toluenesulfonic acid, anhydride with isocyanic acid 
CAS NO: 4083-64-1 
Molecular Formula: C₈H₇NO₃S 
Molecular Weight: 197.2111  
Molecular Structure:

Melting Point: 5°C 
Product Categories: Benzene derivatives ; Benzene derivates ; Sulfur Compounds (for Synthesis) ; Synthetic Organic Chemistry
Polar Surface Area: 71.95 Å² 
Index of Refraction: 1.566 
Molar Refractivity: 50.33 cm³ 
Molar Volume: 154.2 cm³ 
Surface Tension: 48.7 dyne/cm 
Density: 1.27 g/cm³ 
Flash Point: 128.5 °C 
Enthalpy of Vaporization: 50.69 kJ/mol 
Boiling Point: 288.8 °C at 760 mmHg 
Vapour Pressure: 0.00396 mmHg at 25°C

 p-Toluene sulphonyl isocyanate (CAS NO.4083-64-1) is used as a water scavenger in urethane products. End application include adhesives, coatings and sealants. It is also used as an intermediate in organic synthesis.

The Hazard Codes of p-Toluene sulphonyl isocyanate (CAS NO.4083-64-1):  Xn 
The Risk Statements information: 
14:  Reacts violently with water  
42:  May cause sensitization by inhalation  
36/37/38:  Irritating to eyes, respiratory system and skin  
The Safety Statements information:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice  
28:  After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)  
30:  Never add water to this product  
RIDADR: UN 2206 6.1/PG 3
WGK Germany: 1
RTECS: DB9032000 
F: 10 
HazardClass:   6.1 
PackingGroup:  III 
Moderately toxic by ingestion and intraperitoneal routes. Low toxicity by inhalation. A mild skin and moderate eye irritant. When heated to decomposition it emits toxic vapors of NO_x and SO_x.

APPEARANCE: clear liquid
Assay (GC): 98.0% min 
SUM IMPURITY: 2.0% max

PACKING: 200kgs in drum 
HAZARD CLASS: 6.1 (Packing Group: II) 
UN NO.: 2206