Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 174375Generated: October 23, 2026

Pigment Red 254

Paintco red 254 · 3,6-Bis(4-chlorophenyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione · DPP RED · 254hong · P-red 254 · C.I. 56110 · PR254 DPP RED · PIGMENT RED 254

https://huagongshe.com/en/chemical/174375

Pigment Red 254 molecular structure

Identifiers & Physical Properties

CAS No.84632-65-5
Molecular formulaC18H10Cl2N2O2
Average molar mass357.2 g/mol
SMILESO=C1N=C(c2ccc(Cl)cc2)c2c(O)[nH]c(-c3ccc(Cl)cc3)c21
InChIKeyJNNHVXMCVRYTTN-UHFFFAOYSA-N
PubChem CID174375
EC No.401-540-3
DTXSIDDTXSID5044736

Chemical & Physical Properties

XLogP4.6
Topological polar surface area65.5
Hydrogen bond donors2
Hydrogen bond acceptors2
Rotatable bonds2
Heavy atoms24
Formal charge0
Complexity525
PolymersPlastics -> Polyolefin-IPURPolyolefin-IIPVC (soft)ABSPVC (rigid)PETPMMAPAPC(E)PSPlastics -> Pigments agents
Food Contact SubstancesFCS -> FDA Cumulative Estimated Daily Intake (CEDI)FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
Physical DescriptionLiquidDry PowderOther SolidCBI
Boiling point672.5±55.0 °C(Predicted)
Density1.57
Storage conditionsSealed in dry,Room Temperature
Solubility10 in mg/100g standard fat at 20 ℃400-30000ng/L at 20-23℃
Physical statepowder to crystaline
Colour Index56110
pKa (acidity coefficient)8.46±0.60(Predicted)
ColorRed to Dark red to Brown
Henry's law constant3.4×109 mol/(m3Pa) at 25℃, Zhang et al. (2010)
InChIInChI=1S/C18H10Cl2N2O2/c19-11-5-1-9(2-6-11)15-13-14(18(24)21-15)16(22-17(13)23)10-3-7-12(20)8-4-10/h1-8H,(H,21,24)(H,22,23)
InChIKeyJNNHVXMCVRYTTN-UHFFFAOYSA-N
SMILESN1C(C2=CC=C(Cl)C=C2)=C2C(=O)NC(C3=CC=C(Cl)C=C3)=C2C1=O
LogP (partition coefficient)2.4-3 at 20℃
CAS DataBase Reference84632-65-5(CAS DataBase Reference)
FDA 21 CFR178.3297
Indirect Additives used in Food Contact Substances3,6-BIS(4-CHLOROPHENYL)-2,5-DIHYDROPYRROLO(3,4-C)PYRROLE-1,4-DIONE
FDA UNIIWGL0620LJ9
EPA Substance Registry SystemPyrrolo[3,4-c]pyrrole-1,4-dione, 3,6-bis(4-chlorophenyl)-2,5-dihydro- (84632-65-5)
TSCA inventory statusTSCA listed
Customs code2933.99.8290
REACH registrationsActive

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 100% (278 of 278) of all reports.Not ClassifiedAggregated GHS information provided per 278 reports by companies from 1 notifications to the ECHA C&L Inventory.This chemical does not meet GHS hazard criteria for 100% (239 of 239) of all reports.Aggregated GHS information provided per 239 reports by companies from 3 notifications to the ECHA C&L Inventory.
Regulatory informationChemical: Pyrrolo[3,4-c]pyrrole-1,4-dione, 3,6- bis(4-chlorophenyl)-2,5-dihydro-Pyrrolo[3,4-c]pyrrole-1,4-dione, 3,6-bis(4-chlorophenyl)-2,5-dihydro- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Pyrrolo[3,4-c]pyrrole-1,4-dione, 3,6-bis(4-chlorophenyl)-2,5-dihydro- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)PMN - indicates a commenced PMN (Pre-Manufacture Notices) substance.REACH registered substance: 3,6-bis(4-chlorophenyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (EC: 401-540-3)Pyrrolo[3,4-c]pyrrole-1,4-dione, 3,6-bis(4-chlorophenyl)-2,5-dihydro-: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesNot Classified
TSCA inventory statusTSCA listed
Customs code2933.99.8290
REACH registrationsActive

Applications & Uses

Uses

3,6-Bis(4-chlorophenyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione is Pigment Red 254; used in preparation method of high-performance polyurethane waterborne waterproof coating.