Vat Yellow 1

Vat Yellow 1 is a vat dye, yellow in appearance under some conditions used in cloth dyeing.^[2]

Quick facts Names, Identifiers ...

Vat Yellow 1

Names
Preferred IUPAC name Benzo[h]benzo[6,7]acridino[2,1,10,9-klmna]acridine-8,16-dione
Other names Flavanthrone Pigment Yellow 24 Flavanthrene Indofast Yellow Sandothrene NGN [1]
Identifiers
CAS Number	475-71-8
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL137369
ChemSpider	61374
ECHA InfoCard	100.006.818
PubChem CID	68059
UNII	5FA52JAB7C Y
CompTox Dashboard (EPA)	DTXSID6060056
InChI InChI=1S/C28H12N2O2/c31-27-15-7-3-1-5-13(15)25-21-17(27)9-12-20-23(21)24-19(29-25)11-10-18-22(24)26(30-20)14-6-2-4-8-16(14)28(18)32/h1-12H Key: KJPJZBYFYBYKPK-UHFFFAOYSA-N
SMILES C1=CC=C2C(=C1)C3=NC4=C5C6=C(C=C4)C(=O)C7=CC=CC=C7C6=NC8=C5C3=C(C2=O)C=C8
Properties
Chemical formula	C28H12O2N2
Molar mass	408.40708 g/mol
Magnetic susceptibility (χ)	−241.0·10−6 cm3/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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The compound is of significance in the history of synthetic colourants. It was first prepared in an era when anthraquinone dyes were being first investigated, inspired by the structure recently proposed for alizarin, a popular natural dye. Related work led to the discovery of the indanthrone.^[3]