Registration Dossier
Registration Dossier
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EC number: 219-348-1 | CAS number: 2421-28-5
Additional physico-chemical information
Administrative data
Link to relevant study record(s)
Description of key information
"Fine" (9 micron) and "ultrafine" (2 micron) particles of the substance demonstrate a potential toward explosion at relatively low concentrations (77 g/m3) and high resistivity, especially when moved across surfaces. Proper handling and transport instructions should be provided to workers to insure a safe working environment.
Additional information
Two sizes of 1,3-Isobenzofurandione, 5,5'-carbonylbis- (BTDA) solid particles (9 microns and 2 microns) were studied in ASTM guideline tests to determine dust explosivity, flammability and electrical conductivity and capacitance testing. While the spontaneous auto-ignition temperatures were high (530 C) for each sample, the minimum explosivity concentrations (with ignition source) were 80 and 77 g/m3, respectively. These values are near the critical threshold of 70 g/m3. The minimum ignition energies were 4 and 1.2 mJ, respectively, for the "fine" and "ultrafine" particles.. These particles melted upon contact when the surface temperature rose to 230 C. The particles were found to have high electrical resistivity potential and short-lived capacitance (max 4 minutes). When the particles are moved across a surface, they are capable of accumulating a charge and can represent a static discharge risk. These properties suggest that proper handling and transport instructions be provided to workers to insure a safe working environment.
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