Description

Technical Parameters

Acid Red 249, also named bright red B, is an organic dye that belongs to the phthalic acid dyes.

It is generally a red crystalline powder, soluble in water and alcohol solvents.

It is acidic in aqueous solution, but its acidity is relatively weak. Mainly used for dyeing and printing of wool, silk and nylon fabrics, and can also be used to make lakes, inks, leather and paper.

Name:C.I.Acid Red 249,C.I.18134

Molecular Structure: Single azo class

Molecular Formula:C₂₉H₂₀C1N₃Na₂O₁₀S₃

Molecular Weight: 748.11

CAS Registry Number:6416-66-6

Manufacturing Methods : 5-Chloro-2-phenoxybenzenamine diazo, and 8-(4-Methylphenylsulfonamido)-1-naphthol-3,6-disulfonic acid coupling.

Properties and Applications: colourful red blue light. Dark red powder, soluble in water, slightly soluble in ethanol for product red, the strong sulfuric acid for product red, diluted for pink; Join the hydrochloric acid solution for red; Add sodium hydroxide to brown. Metal ion to the colored light no effect. Used for wool, silk and polyamide fiber fabric dyeing and printing, but also for direct dyes and with bath dyeing wool/rayon blended fabric.

Specification:

Product name			ACID RED 249			Dyeing depth 0.5% 1%
C.I.NO.			ACID RED 249
SPECIFICATION	APPEARANCE		Dark red powder
	PH(1%water solution)		8.50-10.50			Water≤				8%
	Shade CMC(2:1)≤		0.5			Water insoluble≤				0.2%
	Solubility	25℃≥	15g/L			Anti-dust≥				Grade 3
		90℃ ≥	50g/L			Finess(80mesh)≤				8%
	stability of solution (90℃/25℃)			15g/L		maximum absorption wavelength				523nm(water solution)
Colouring property			Fabrics	Wool	acrylic		Polyester		nylon	Cotton	acetate
			cloth pattern
Fastness	fabrics	Dyeing depth	Light fastness	Washing fastness (50℃)	Perspiration resistance (alkaline)			Rubbing			fastness to water
								wet		dry
	nylon	1%	4	CH：4-5 PA ：5 CO*：5	CH：5 PA：4 CO*：4			4-5		4-5	CH：4 PA：3-4 CO*：4
	wool	1%	3-4	CH：4 WO: 4 CO*：4-5	CH：4 WO：3 CO*：3			4		4-5	CH：4 WO: 4 CO*：4
Feature	Medium dye levelling and lint resistance With bright color, suitable for dyeinng light, medium color Wool dyeing recommended PH:4.5-5.5, nylon dyeing recommended PH:4.5-5.5