Nylon Dye Tracid Violet 4BNS Acid Violet 17

Tracid Violet 4BNS is a uniform powder ranging from dark bluish green to blue purple, without lumps or impurities.

1. Color Characteristics: The aqueous solution of Tracid Violet 4BNS presents a bright red-purple color (coral-like color), with a bright and full color.

2. Solubility: Acidic Violet 17 is easily soluble in water (appearing purple) and ethanol (appearing purple-blue); it is slightly soluble in ethylene glycol ethyl ether; it is insoluble in organic solvents such as acetone, ether, and benzene.

3. Ion Nature: Strong anionic type. Acidic Violet 17 is combined with protein fibers through ionic bonds and is suitable for weakly acidic baths (pH 4-6).

4. Color Reaction (Qualitative Identification):

1. In concentrated sulfuric acid: Tracid Violet 4BNS shows a red-yellow color, and becomes light green after dilution.

2. In concentrated nitric acid: It shows a blue-violet color.

3. In water solution + NaOH: The color lightens to a dark purple.

7. Spectral Characteristics: The maximum absorption wavelength (λmax) is approximately 545nm (aqueous solution).

1. Precise Color Light Distinction: Acidic Violet 17 is a red-purple coralline color, significantly different from acidic Violet 5BN (blue-purple) and acid brilliant red (pure red light). During procurement, it is necessary to verify the C.I. number and color light samples.

2. Water Quality and Metal Ions: Tracid Violet 4BNS must be used with soft water / deionized water. During dyeing, EDTA chelating agent must be added to prevent the color light from darkening and reddening due to copper and iron ions.

3. Dissolution Method: Tracid Violet 4BNS is fully dissolved in 60-80°C hot water, cooled to the dyeing temperature before adding to the dye bath to avoid blockage caused by cold water being directly added.

4. Compatibility and Fixation: Acidic Violet 17 can be used for blending with all weakly acidic / acidic dyes; it is strictly prohibited to be used in the same bath with cationic dyes (precipitation); the wet fastness is excellent, and generally no fixation is required; the sunfastness is medium and can be enhanced by adding UV absorbers.

5. Storage and Use: Seal and prevent moisture, after lumps form, crush and dissolve in hot water does not affect usage; expired dyes should be tested for color light and solubility first, and can be used only if they are qualified.

6. Special for Biological Dyeing: For protein electrophoresis, select high-purity (HPLC ≥ 70%) reagent-grade products to avoid impurities affecting the clarity of dyeing.

Standard package: 25kg woven bag / fibre drum. Store hermetically, keep dry. Do not store together with strong oxidants.