Description

β-Naphthol Violet is a synthetic organic dye belonging to the azo dye class, valued for its distinct violet colorant properties. This compound is significant for its role as a versatile intermediate and colorant in various industrial processes requiring precise and stable pigmentation. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for dyeing, printing, and research applications.

Application

• Primary colorant for dyeing synthetic and natural fibers in the textile industry.
• Key component in the formulation of printing inks for packaging and publications.
• Used as a stain or indicator in biological and histological research laboratories.
• Intermediate in the synthesis of more complex azo dyes and pigments.
• Coloring agent for leather and paper products.
• Potential use as a color standard or reference material in analytical chemistry.

Basic Information

Product Name	β-Naphthol Violet
CAS No.	7143-21-7
Molecular Formula	C16H12N2O3S
Molecular Weight	312.34 g/mol
Synonyms	Acid Violet 7; C.I. 18055; Naphthol Violet; 7-Hydroxy-8-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid; 2-Naphthol-8-azo-4'-sulfobenzene; Acid Violet BN; C.I. Acid Violet 7; Azo Violet
EINECS	230-426-6

Quality Control

Our β-Naphthol Violet is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent purity, color strength, and performance. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key parameters such as assay, hue, and impurity profile to meet your specific application requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark violet to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Solubility	Freely soluble

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