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Manual
                                          Chemical Safety Data Sheet                                       Sheet
                                                                                                           SD-73


                            TOLYLENE DIISOCYANATE

                                                     ADOPTED MARCH 1959

                                                         1 . NAMES

                                           Chemical Name:          Tolylene Diisocyanate
                                           Common Names:           Tolylene Diisocyanate
                                                                   Toluene Diisocyanate
                                                                   TDI
                                           Formulae:               CH3C0H3(NCO)2
                                             ch3                          ch3



                                           Ap NCO                OCN-A - NCO
                                           U                            U
                               2,4 Tolylene                                     2,6 Tolylene
                               Diisocyanate                                     Diisocyanate

                                             NCO




                2.1 GRADES AND STRENGTHS
                     Grade: Commercial, distilled
                     Strength: Minimum assay 99.0%
                     Commercially available in three isomer ratios—
                     (a)  100% 2,4
                     (b)   80%  2,4;  LA  tO   p  Q k  Ch
                     (c)   65%  2,4;  cn o  o  t

                2.2 PROPERTIES AND CHARACTERISTICS
                                                                   100% 2,4         80% 2,4;         K O  CC  m  c
                                                                                    20% 2,6            n   i
                                                                                                           i  c
                     Physical State                                  Liquid           Liquid           Liquid
                     Approximate Flash Point (Open Cup)                  .. 132°C.(270°F.)
                                                                                  132°C.(270°F.)  132°C.(270°F.)
                     Boiling Point                               251°C.(484°F.)   251°C.(484°F.)  251°C.(484°F.)
                     Color                                      ..Water white to pale yellow
                     Corrosivity
                                                                ..Relatively noncorrosive at normal temperatures
                     Heat of Evaporation                        __144.9 BTU/lb. (120-180°C.)
                     Hygroscopicity                             ..Reacts with water with evolution of carbon dioxide
                     Light Sensitivity                          Ultra violet causes yellowing
                     Melting Point                               19.5-21.5°C.       11.5-13.5°C.      3.5-5.5°C.
                                                                  (67-71°F.)        (53-56°F.)        (38-42°F.)
                     Odor                                        Sharp, pungent.
                     Reactivity------ ---------------------------------------------Reacts with compounds containing active hydrogen, the
                                                                reaction rate depending upon the nature of the active
                                                                hydrogen compound. Can be violent.
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