Toluene Diisocyanate (TDI)

Toluene Diisocyanate (TDI)                                                                               

Molecule Formula : C9H6N2O2               CAS Registry Number 584-84-9



Toluene diisocyanate (TDI) is an aromatic diisocyanate. It is produced for reaction with polyols to form polyurethanes. It exists in twoisomers, 2,4-TDI (CAS: 584-84-9) and 2,6-TDI (CAS: 91-08-7). 2,4-TDI is produced in the pure state, but TDI is often marketed as 80/20 and 65/35 mixtures of the 2,4 and 2,6 isomers respectively.
 It is a highly produced diisocyanate, accounting for 34.1% of the global isocyanate market in 2000, second only to MDI. All major producers of TDI are members of the International Isocyanate Institute, whose aim is the promotion of the safe handling of TDI in the workplace, community and environment.


NFPA 704              EU Classification


Safety-phrases: (S1/2),23,36/37,45,61
Risk-phrases: 26,36/37/38, 40

Storage and Handling                            

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