128-66-5

viscous orange liquid

Viscous orange liquid. Used for coloring of cotton, wool and cellulose acetate.

Water soluble.

Vat Yellow 4 reacts very readily with reducing agents to give a colorless or nearly colorless product. Subsequent oxidation then restores the color.

ACUTE/CHRONIC HAZARDS: When heated to decomposition Vat Yellow 4 emits acrid smoke and irritating fumes.

Vat Yellow 4 is probably combustible.

Vat Yellow 4 is a commercial dye used in textiles. Polyaromatic hydrocarbon with potential carcinogenic activity.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.

ChEBI: Vat Yellow 4 is an ortho- and peri-fused polycyclic arene.

(a) 3-Benzoylbenzanthrone?and Aluminium chloride and antioxidant for the closed-loop response; (b) 1,5-Dibenzoyl-2-naphthaene?in Aluminium chloride and sodium chloride were under existing closed-loop response.

7,14-Dibenzpyrenequinone, Indanthren Golden Yellow GK, is prepared from 1,5-dibenzoylnaphthalene (itself prepared from naphthalene with benzoyl chloride – AlCl3) by fusion with AlCl3-NaCl at 160 ?C and aeration with oxygen , , .

red light yellow. Yellow brown powder. Soluble in nitrobenzene, four hydrogenated naphthalene and dimethyl benzene, slightly soluble in acetone, ethanol, benzene, chloroform, o-chlorophenol, Pyridine and toluene. The strong sulfuric acid to red light purple, orange after diluted precipitation, in alkaline insurance powder is in stock for purplish red color; In the acidic insurance powder also in stock for golden brown. Can be used for the discharge printing of cotton, mainly used in the winter sun often dark cotton print, also suitable for silk and polyamide fiber dyeing.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	4-5	4-5	5-6	5	4-5	3-4	4
AATCC	5	5	4-5	5	4