Basic information Safety Supplier Related

3,3'-Dimethyl-4,4'-biphenylene diisocyanate

Basic information Safety Supplier Related

3,3'-Dimethyl-4,4'-biphenylene diisocyanate Basic information

Product Name:
3,3'-Dimethyl-4,4'-biphenylene diisocyanate
Synonyms:
  • 3,3'-BITOLYENE-4,4'-DI-ISO-CYANATE
  • 3,3'-BITOLYLENE-4,4'-DIISOCYANATE
  • 3,3'-DIMETHYLBIPHENYL-4,4'-DIYL DIISOCYANATE
  • 3,3'-DIMETHYLDIPHENYL-4,4'-DI-ISO-CYANATE
  • 3,3'-DIMETHYL-4,4'-BIPHENYLENE DIISOCYANATE
  • 3,3'-DIMETHYL-4,4'-BIPHENYLENEIISOCYANATE
  • 4,4’-biorthotolylenediisocyanate
  • 4,4’-diisocyanato-3,3’-dimethyl-1,1’-biphenyl
CAS:
91-97-4
MF:
C16H12N2O2
MW:
264.28
EINECS:
202-112-7
Product Categories:
  • other
  • Biphenyls (for High-Performance Polymer Research)
  • Functional Materials
  • Reagent for High-Performance Polymer Research
Mol File:
91-97-4.mol
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3,3'-Dimethyl-4,4'-biphenylene diisocyanate Chemical Properties

Melting point:
70-72°C
Boiling point:
195-197°C (667 Pa)
Density 
1.197 (80°C)
refractive index 
1.5800 (estimate)
Flash point:
218°C
storage temp. 
0-10°C
CAS DataBase Reference
91-97-4(CAS DataBase Reference)
EPA Substance Registry System
3,3'-Dimethyl-4,4'-diphenylene diisocyanate (91-97-4)
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Safety Information

RTECS 
DV3960000
HS Code 
29291090
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3,3'-Dimethyl-4,4'-biphenylene diisocyanate Usage And Synthesis

Reactivity Profile

Isocyanates and thioisocyanates, such as 3,3'-Dimethyl-4,4'-biphenylene diisocyanate, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].

Safety Profile

Poison by intravenous route. When heated to decomposition it emits toxic fumes of NOx. See also CYANATES and ESTERS.

3,3'-Dimethyl-4,4'-biphenylene diisocyanateSupplier

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