dye|World dye variety

Name:C.I.Direct Yellow 66,C.I.25225

Molecular Structure: Double azo class

C.I.Direct Yellow 66,C.I.25225,650.51,C30H20N8Na2O7,Para Yellow RL

Molecular Formula:C₃₀H₂₀N₈Na₂O₇

Molecular Weight: 650.51

CAS Registry Number:

Manufacturing Methods : 4-Nitrobenzenamine diazo, coupled with 2-Hydroxybenzoic acid, will the nitro reduction, and 4-Nitrobenzoyl chloride condensation , then the nitro reduction nitride pay equal attention to, and 1-(3-Nitrophenyl)-3-carboxy-5-pyrazolone coupling and will last a nitro reduction.

Properties and Applications: yellow. Moderate soluble in water for yellow orange, hardly soluble in alcohol. The strong sulfuric acid in orange, yellow for diluted. The dye solution to join strong hydrochloric acid colour and lustre is obvious change; Add thick sodium hydroxide solution without change color. Used for cellulose d dyeing and printing, dyeing copper, iron ion in the same light

List of Suppliers:

Para Yellow RL( IG Farbenindustrie AG )