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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 14513Generated: November 4, 2026

3,4-Dichloro-2,5-dihydro-1H-pyrrole-2,5-dione

3,4-DICHLORO-1H-PYRROLE-2,5-DIONE · Dichloromaleimide · 2,3-Dichloromaleimide · Aids018375 · Aids-018375 · DICHLOROMALEINIMIDE · 3,4-dichloromaleimide · 3,4-DICHLOROMALEINIMIDE

https://huagongshe.com/en/chemical/14513

3,4-Dichloro-2,5-dihydro-1H-pyrrole-2,5-dione molecular structure

Identifiers & Physical Properties

CAS No.1193-54-0
Molecular formulaC4HCl2NO2
Average molar mass165.96 g/mol
Monoisotopic mass164.9384337 g/mol
SMILESO=C1NC(=O)C(Cl)=C1Cl
InChIKeyKVBAKSQRUXXHCK-UHFFFAOYSA-N
PubChem CID14513
ChEBICHEBI:184738
EC No.873-408-7
DTXSIDDTXSID30152405

Chemical & Physical Properties

XLogP1
Topological polar surface area46.2
Hydrogen bond donors1
Hydrogen bond acceptors2
Rotatable bonds0
Heavy atoms9
Formal charge0
Complexity199
SpringerMaterials PropertiesNuclear quadrupole resonance spectroscopy
Melting point175 °C175°C
Physical DescriptionSolid
Boiling point232.9±40.0 °C(Predicted)
Density1.4206 (rough estimate)
Refractive index1.6100 (estimate)
Storage conditionsunder inert gas (nitrogen or Argon) at 2–8 °C
pKa (acidity coefficient)4.69±0.60(Predicted)
AppearanceLight yellow to yellow Solid
CAS DataBase Reference1193-54-0
FDA UNII6G6K57D4OT
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP261-P305+P351+P338
Toxicitymouse,LD50,intraperitoneal,31mg/kg (31mg/kg),Archives of Toxicology. Vol. 37, Pg. 15, 1976.

Safety & Regulations

GHS classificationWarningH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory.
Toxicitymouse,LD50,intraperitoneal,31mg/kg (31mg/kg),Archives of Toxicology. Vol. 37, Pg. 15, 1976.
Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP261-P305+P351+P338

Applications & Uses

Uses

3,4-Dichloro-1H-pyrrole-2,5-dione is used in the synthesis of N-aryl- and N-aralkylmaleimides which possesses anti-bacterial properties against Escherichia coli and Staphylococcus aureus.