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Pigment Yellow 104

Catalog Number DYE-PIG-0591
CAS Number 15790-07-5
Structure
Synonyms Ariabel Tangerine, Conalake Sunset Yellow, FD&C Yellow, Neelilake Sunset Yellow
Molecular Weight 408.41
Molecular Formula C16H12N2O7S2
CI Number C.I.15985:1
Color yellow
Main Molecular Structure Single azo
Preparation Method 4-Aminobenzenesulfonic acid diazotization, and 6-Hydroxynaphthalene-2-sulfonic acid coupling, and then translate into aluminum salt.
Properties Soluble in ethanol. In concentrated sulfuric acid to yellow, after diluted solution for yellow; In concentrated nitric acid for yellow solution. Its aqueous solution to join hydrochloric acid don't change color; Join concentrated sodium hydroxide solution for red light yellow

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