View source for Vat Yellow 4

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==Overview==
[[Image:Vat Yellow 4.png|thumb|left|200px|Vat Yellow 4]]
'''Vat Yellow 4''', also known as '''Golden Yellow GK''', '''dibenzochrysenedione''', '''dibenzpyrenequinone''', '''Tyrian Yellow I-GOK''', and '''C.I. 59100''', is a yellow synthetic [[anthraquinone]] [[vat dye]]. Chemically it is dibenzo[b,def]chrysene-7,14-dione, or 3,4:8,9-dibenzopyrene-5,10-dione, or C<sub>24</sub>H<sub>12</sub>O<sub>2</sub>. It has the appearance of a viscous orange liquid.

Vat Yellow 4 is used mostly as a [[dye]] for [[textile]]s and [[paper]]. 

Together with [[benzanthrone]], it is used in some older [[pyrotechnic]] compositions for green and yellow [[colored smoke]]s.

Vat Yellow 4 is a [[List of IARC Group 3 carcinogens|Group 3 carcinogen]] according to the [[International Agency for Research on Cancer|IARC]], as the evidence of its carcinogenity to humans is inadequate.

{{SMILESCAS|CAS=128-66-5|SMILES=O=C(c5ccccc56) c2c1c6ccc(C (c3ccccc34)=O) c1c4cc2}}


==External links==



[[Category:Anthraquinone dyes]]
[[Category:Polycyclic aromatic compounds]]
[[Category:Ketones]]
[[Category:IARC Group 3 carcinogens]]
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