According to product name:
 
According to CAS:
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Products---Classic Products---Product Detail
1,2,4,5-Benzene Tetracarboxylic dianhydride
Structure:
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CAS :
89-32-7
Molecular formula :
C10H2O6
Molecular weight :
218.12
Relevant parameter :
appearancewhite or pale yellow, pale grey powder or needle
crystal
melting point 283-287
neutralization equivalent54.5+/-0.2
content%min 99.0

Package :