Description

C.I. Acid Violet 75 is a synthetic organic dye belonging to the acid dye class, valued for its bright and stable violet hue. It is a critical component for imparting color to protein-based fibers like wool, silk, and nylon, as well as for specialty applications requiring good light and wash fastness. This dye is essential for manufacturers in the textile, leather, and ink industries seeking consistent, high-quality coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, nylon, and modified acrylic fibers to achieve vibrant violet shades.
• Leather Coloring: Used in the dyeing of leather goods, providing rich color penetration and good fastness properties.
• Ink Formulation: A key pigment for manufacturing inks, including those for ballpoint pens, stamp pads, and specialty printing.
• Paper Staining: Employed for the coloration of specialty papers and paper products.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Food Contact Material Coloring: May be used for coloring packaging materials where applicable regulations are met.

Basic Information

Product Name	C.I. Acid Violet 75
CAS No.	12239-13-3
Molecular Formula	C20H12N2Na2O8S2
Molecular Weight	534.42 g/mol
Synonyms	Acid Violet 75; C.I. 17575; Acid Leather Violet PR; Acid Fast Violet 2R; Acid Violet 5R; Acid Violet 2R; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-, disodium salt; D&C Violet No. 2 (discontinued use).
EINECS	235-439-1

Quality Control

Our C.I. Acid Violet 75 is manufactured under a strict quality management system. Each batch is tested to ensure it meets precise specifications for color strength, shade, and purity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment to guarantee consistency and performance for your application.

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.

Specification

Item	Specification
Appearance	Dark violet powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Heavy Metals (as Pb)	Max. 20 ppm

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