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CAS 4083-64-1
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TNJ Chemical provides information of CAS 4083-64-1 such as TDS MSDS. If you need more about CAS 4083-64-1 or want to buy P-Toluenesulfonyl isocyanate, please feel free to contact [email protected]

P-Toluenesulfonyl isocyanate (PTSI) (CAS 4083-64-1) is clear, colorless liquid, insoluble in water.

 P-Toluenesulfonyl isocyanate (PTSI) can be used as solvent, and filler, pigments such as dehydrating agent and effectively applied to the wet curing one-component and conventional two-component polyurethane coating system. In addition, P-Toluenesulfonyl isocyanate (PTSI) can also be used as a stabilizer and butyl purification of double isocyanate to prevent its deterioration or discoloration.


Appearance                           Colorless transparent liquid
Assay                                    ≥98.50 %
Color (APHA)                          ≤20
p-toluenesulfonyl chloride     ≤1.0%


1) P-Toluenesulfonyl isocyanate (PTSI) can be used in the process of making paint as solvent, filler, pigment and asphalt tar dehydrating agent, such as the react with water to produce carbon dioxide and toluene sulfonamide, the latter is usually not with alkyl isocyanate and aryl isocyanate reaction, and dissolve in ordinary solvents. In addition, it will not lead to system yellowing phenomenon. Through the use of P-Toluenesulfonyl isocyanate (PTSI) in producing polyurethane coating, system loss caused by wet surface light, yellowing and reaction phenomenon such as foam were reduced.
2) In Pharmaceutical industry, it is often used as Pharmaceutical intermediate.

200 kgs/drumx80 drums=16 tons/1x20' FCL

P-Toluenesulfonyl isocyanate (PTSI) has high reactivity, thus the application and operation should be especially careful.  Para-Toluenesulfonyl isocyanate (PTSI) reacts fast with water, alcohol, amine, acid and alkali, and therefore do not pour into this kind of material in the product containers. Its reaction with 1 gram of water and the carbon dioxide gas is 1.3 liters. Such as moisture into the container, in a very short time a large number of gas will occur, which can cause the container (even closed container) to be on fire.

This product is sensitive to moisture, so it should be in sealed, original packaging container, dry storage. Under good condition, the shelf life is at least six months.

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