1,4-Diamino-2,3-dihydroanthraquinone

1,4-Diamino-2,3-dihydroanthraquinone is an anthraquinone dye used with Disperse Red 9 in colored smoke to introduce a violet color. It is also used in dyes and marine flares.

1,4-Diamino-2,3-dihydroanthraquinone

Names
Preferred IUPAC name 1,4-Diamino-2,3-dihydroanthracene-9,10-dione
Other names Solvent violet 47
Identifiers
CAS Number	81-63-0 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL3392069
ChemSpider	4511053 Y
ECHA InfoCard	100.001.244
EC Number	201-367-1
PubChem CID	5354979
UNII	U46FO9XL97
CompTox Dashboard (EPA)	DTXSID70883261
InChI InChI=1S/C14H12N2O2/c15-9-5-6-10(16)12-11(9)13(17)7-3-1-2-4-8(7)14(12)18/h1-4H,5-6,15-16H2 Y Key: SSGALQHXKMAJTL-UHFFFAOYSA-N Y
SMILES O=C2c1ccccc1C(=O)C=3C2=C(N)CCC=3N
Properties
Chemical formula	C14H12N2O2
Molar mass	240.262 g·mol−1
Appearance	Dark greenish to brownish powder
Density	1.4 g/cm3
Melting point	248 to 252 °C (478 to 486 °F; 521 to 525 K)
Boiling point	375.1 °C (707.2 °F; 648.2 K)
Solubility in water	Soluble in hot nitrobenzene
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Mutagenic; emits NOx vapors when heated to decomposition.
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H317
Precautionary statements	P261, P264, P270, P272, P280, P301+P312, P302+P352, P321, P330, P333+P313, P363, P501
Flash point	180.7 °C (357.3 °F; 453.8 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Synthesis

1,4-Diaminoanthraquinone is reacted with sodium dithionite to produce 1,4-diamino-2,3-dihydroanthraquinone.