Description

Acid Violet 7 is a synthetic anthraquinone-based acid dye known for its vibrant violet to blue color. This high-purity colorant is valued for its strong tinctorial strength and good lightfastness properties in demanding applications. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries seeking consistent and reliable coloration.

Application

• Textile Dyeing: Primary application for dyeing protein fibers like wool, silk, and nylon, producing clear violet shades.
• Leather Finishing: Used for coloring leather goods, providing rich and uniform color penetration.
• Ink Manufacturing: A key component in the formulation of specialty inks, including inks for ballpoint pens and stamp pads.
• Paper Coloring: Employed for tinting high-grade papers and decorative paper products.
• Biological Staining: Used in histology and microscopy as a staining agent for tissue samples.
• Cosmetic Additive: Approved grades can be used as a colorant in certain cosmetic formulations.

Basic Information

Product Name	Acid Violet 7
CAS No.	4197-09-5
Molecular Formula	C41H30N3O6S2•Na
Molecular Weight	739.80 g/mol
Synonyms	Acid Violet 7; C.I. 18055; Acid Violet 7B; Acid Violet R; Wool Violet 5BN; Naphthalene Violet; C.I. Acid Violet 7; Acid Leather Violet 5B; Acid Fast Violet B; Acid Violet 5BNS; 7-Acetylamino-4-hydroxy-3-[(4-methyl-2-sulfophenyl)azo]-2-naphthalenesulfonic acid, monosodium salt
EINECS	224-077-1

Quality Control

Our Acid Violet 7 is manufactured under a strict quality management system. Each batch is tested to ensure compliance with specifications for color strength, shade, solubility, and impurity profiles. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

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 incompatible materials.

Specification

Item	Specification
Appearance	Dark violet to blue powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%

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