Page 1 - Combined_8_OCR

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.