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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 13976Generated: October 23, 2026

Quinacridone

PIGMENT VIOLET 19 · Violet 19 · 5,12-dihydroquino[2,3-b]acridine-7,14-dione · 3-b)acridine-7,14-dione,5,12-dihydro-quino( · 5,12-dihydroquinolino[2,3-b]acridine-7,14-dione · 5,12-dihydroquinolino[2,3-b]acridine-7,14-quinone · e3bred · rede3b

https://huagongshe.com/en/chemical/13976

Quinacridone molecular structure

Identifiers & Physical Properties

CAS No.1047-16-1
Molecular formulaC20H12N2O2
Average molar mass312.3 g/mol
Monoisotopic mass312.08987762 g/mol
SMILESO=c1c2ccccc2[nH]c2cc3c(=O)c4ccccc4[nH]c3cc12
InChIKeyNRCMAYZCPIVABH-UHFFFAOYSA-N
PubChem CID13976
ChEBICHEBI:174977
EC No.213-879-2
DTXSIDDTXSID5027354

Chemical & Physical Properties

XLogP4
Topological polar surface area58.2
Hydrogen bond donors2
Hydrogen bond acceptors4
Rotatable bonds0
Heavy atoms24
Formal charge0
Complexity500
Chemical classesDyes -> Acridine Dyes
PolymersPlastics -> Polyolefin-IPURPolyolefin-IIPVC (soft)ABSPVC (rigid)PETPMMAPAPC(E)PSPlastics -> Pigments agents
CosmeticsHair dyeingCosmetic colorant
SpringerMaterials PropertiesCrystal structure
LogP (partition coefficient)1.9 (estimated)
Density1.51.5 g/cm3
Color/FormRed to violet solid with blueish or yellowish tint depending upon crystalline form.particle characteristics: thin plates
SolubilityInsoluble in waterInsoluble in organic solvents and dispersion media.
Melting point390 °C
Food Contact SubstancesFCS -> FDA Cumulative Estimated Daily Intake (CEDI)FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFRFCS -> FDA Inventory of Effective Food Contact Substance (FCS) Notifications
Refractive indexRefractive index: quinacridine red (gamma), n(Na) Av. 2.04quinacridine red (beta), Av. 2.02
Physical DescriptionLiquidOther SolidDry PowderCBIRed to violet solidBluish or yellowish tint depending of form[HSDB] Red odorless powder[MSDSonline]
Boiling point568.5±50.0 °C(Predicted)
Storage conditionsSealed in dry,Room Temperature
Physical stateSolid:nanomaterial
pKa (acidity coefficient)-2.96±0.20(Predicted)
Colour Index46500
ColorOrange to Amber to Dark red
Cosmetics Ingredients FunctionsCOLORANTHAIR DYEING
LogP (partition coefficient)2.2 at 24℃ and pH7
CAS DataBase Reference1047-16-1(CAS DataBase Reference)
Indirect Additives used in Food Contact SubstancesQUINACRIDONE RED (C.I. PIGMENT VIOLET 19, C.I. NO. 73900)
FDA 21 CFR175.300178.3297
EWG's Food Scores1-3
FDA UNII11P487375P
NIST Chemistry ReferenceQuino[2,3-b]acridine-7,14-dione, 5,12-dihydro-(1047-16-1)
EPA Substance Registry SystemQuinacridone (1047-16-1)
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319
GHS precautionary statementsP261-P302+P352-P305+P351+P338
Safety statements (S)24/25
RTECS numberVA8533500
TSCA inventory statusTSCA listed
Customs code29339900
Hazardous substances data1047-16-1(Hazardous Substances Data)
ToxicityLD50 oral in rat: > 20mL/kg
REACH registrationsActive

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 99.6% (760 of 763) of all reports.Not ClassifiedAggregated GHS information provided per 763 reports by companies from 4 notifications to the ECHA C&L Inventory.
Regulatory informationChemical: Quino[2,3-b]acridine-7,14-dione, 5,12-dihydro-Quino[2,3-b]acridine-7,14-dione, 5,12-dihydro- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Quino[2,3-b]acridine-7,14-dione, 5,12-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)Status: Active Update: 23-11-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/14755Quino[2,3-b]acridine-7,14-dione, 5,12-dihydro-: Does not have an individual approval but may be used under an appropriate group standard
Hazards summarySkin reactions have been reported: inflammation in a tattoo after sun exposure and acne-like changes on the face of a child colored with a red felt-tip penAlso acne-like reaction on the skin of rabbits after coloring with red felt-tip pen[HSDB] No known adverse effects on human healthNot an irritantNot a sensitizer[MSDSonline] See Acridine.
Special ReportsA BRIEF DESCRIPTION OF THE CHEMICAL PROPERTIES, DEVELOPMENT, & EFFORTS TOWARD GAINING APPROVAL OF THE QUINACRIDONE PIGMENT VIOLET #19 (LINEAR TRANS QUINACRIDONE) BY THE FDA IS PRESENTED.[VIOLET #19--POTENTIAL NEW COSMETIC COLORCOSMET TOILET 94(MAY) 19 (1979)][ITC/USEPAInformation Review #315 (Draft) Cinquasia Red 1982]
TSCA requirementsSection 8(a) of TSCA requires manufacturers of this chemical substance to report preliminary assessment information concerned with production, use and exposure to EPA.
Hazard Classes and CategoriesNot Classified
Environmental fateMuch of cinquasia red will be bound up in the components of landfills, junkyards, and general dump sites.Terrestrial: The insolubility of cinquasia red will cause it to collect in soils and sediments.Aquatic: Due to its insolubility, cinquasia red may reside in the water column for a substantial period, long enough to become part of deep sea sediments.
Adverse effectsDermatotoxin - PICD (photoirritant contact dermatitis).
Human Toxicity ExcerptsTwo different red pigments used for tattooing were found to give rise to inflammatory reactions in the skin. No inorganic component was found in the pigments. NMR and MS analyses elucidated the molecular structures ... a red-violet pigment was found to be linear quinacridone. A strong exposure to UV-light was reported in most cases prior to the onset of the inflammation.Acne-like changes were observed on a child's cheek after coloring them with a red felt tip pen. Numerous comedos appeared around a red tattoo colored with felt tip pen ink on a 16-yr-old girl.
Artificial Pollution SourcesReleased to the environment as fugitive dust during manufacturing and end use.EPA reported that the waste streams from the manufacture of cinquasia red are brines which contain small amounts of organic chemicals and strong acid wastes.
Environmental BiodegradationBiodegradation is expected to be slow. The strong crystal lattice (e.g. low sol) is partially responsible.
Environmental BioconcentrationCinquasia red should not bioconcentrate, since it is insoluble, and therefore, will not be taken up into the body.
Non-Human Toxicity ExcerptsPigment Violet #19 was nonmutagenic by Ames test.In rabbits ... /pigment violet 19/ in felt tip pens produced a comedo type reaction.
Probable Routes of Human Exposure17,082 workers were potentially exposed to cinquasia red in 1980 from the chemical, rubber, plastics and paper industries.
TSCA inventory statusTSCA listed
RTECS numberVA8533500
Customs code29339900
ToxicityLD50 oral in rat: > 20mL/kg
Signal wordWarning
GHS pictogramGHS07
Safety statements (S)24/25
GHS hazard statementsH302-H315-H319
REACH registrationsActive
GHS precautionary statementsP261-P302+P352-P305+P351+P338
Hazardous substances data1047-16-1(Hazardous Substances Data)

Applications & Uses

Description

CI 73900 is classed chemically as a quinacridone colour.

Uses

Quinacridone is mainly used for coloring plastics, coatings, resins, coating printing, inks, paints, rubber (including synthetic rubber) and plexiglass, and can also be used for dope (slurry) coloring of synthetic fibers.