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CAS 2421-28-5

CAS 2421-28-5

Purity / Analysis Method >96.0%(T)
Molecular Formula / Molecular Weight C17H6O7= 322.23
Physical State (20 deg.C) Solid
Storage Temperature Room Temperature (Recommended in a cool and dark place, <15°C)
Store Under Inert Gas Store under inert gas
Condition to Avoid Moisture Sensitive
CAS RN 2421-28-5
MDL Number

MFCD00005923

2421-28-5 – Uses and synthesis methods

Introduction Benzophenone-3. 3 ‘,4.4’-tetracarboxylic dianhydride (BTDA) is used as an intermediate and polycondensation (fiber and powder production) in the industrial field to make plastic products or fine chemicals. Since BTDA is only manufactured and handled under closed conditions in an industrial environment, the consumer risk is minimal. The environmental impact, ecotoxicology and toxicology information available to BTDA is provided based on research and/or reliable assessment of its hazard characteristics.
physical and chemical properties BTDA is a brown crystalline powder. The substance has a melting point of 218.67°C and decomposes at 360°C. The autoignition temperature is very high and no flammability is observed. The density of the substance is 1.5452 g/ml and the vapor pressure is 6.53E-011 Pa. The substance is slightly soluble in water, log Pow is 3.3.
application BTDA is used in the industrial sector as an intermediate in the manufacture of plastic products or fine chemicals.
health hazards BTDA has no acute toxicity through oral and inhalation routes or skin contact. The substance irritates the eyes and respiratory tract. BTDA is sensitive to skin. BTDA is not mutagenic. BTDA is used as an intermediate and polycondensed with BTDA (fiber and powder production) to manufacture plastic products or fine chemicals in the industrial field. The use of BTDA includes the use in closed systems and mixing and mixing in batch processes, as well as the transfer or transfer of substances from containers or large and small containers to containers or large containers.
use Polymerized monomer, used to synthesize polymeric monomer of high temperature resistant polymer materials.

2421-28-5 – Security information

dangerous goods mark Xi
hazard category code 36/37
safety instructions 25
WGK Germany 1
F 21
auto-ignition temperature 975 °F
TSCA Yes
customs code 29183000


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