Description

Acid Violet 7 is a synthetic anthraquinone dye known for its vibrant violet hue and excellent color fastness properties. This high-performance colorant is valued for its ability to deliver consistent, brilliant shades with strong adhesion to various substrates. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries seeking reliable and durable violet coloration. The compound is supplied under the identifier CAS NO 4321-69-1.

Application

Acid Violet 7 is a versatile dye with several key industrial applications:

• Textile Dyeing: Primary application for dyeing protein fibers like wool, silk, and nylon to achieve violet shades.
• Leather Finishing: Used for coloring leather goods, providing rich and uniform violet tones.
• Ink Manufacturing: A key pigment for specialty inks, including those for ballpoint pens and stamp pads.
• Paper Coloring: Employed in the production of tinted papers and decorative stationery.
• Biological Staining: Used in histology and microscopy as a staining agent for tissue samples.
• Cosmetic Additive: Found in certain hair dyes and color cosmetics where approved for use.

Basic Information

Product Name	Acid Violet 7
CAS No.	4321-69-1
Molecular Formula	C20H12N2Na2O8S2
Molecular Weight	566.43 g/mol
Synonyms	Acid Violet 7; C.I. 18055; Acid Violet 7B; Acid Violet R; Wool Violet 5BN; Anthraquinone Violet; Sodium 1-amino-4-[(4-aminophenyl)amino]-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate; C.I. Acid Violet 7
EINECS	224-357-1

Quality Control

Every batch of Acid Violet 7 is manufactured and tested under a strict quality management system to ensure it meets the high standards required by our global industrial partners. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, detailing key parameters such as purity, strength, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Dark Violet Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.