Description

Acid Anthracene Brown Pg is a synthetic organic dye belonging to the acid dye class, identified by CAS No. 6369-32-0. This product is valued for its strong affinity to protein fibers like wool and silk, providing durable and vibrant coloration. It is primarily utilized in the textile industry for dyeing natural fibers and finds applications in leather processing and specialty paper coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve brown shades with good wash and light fastness.
• Leather Finishing: Used in the coloration of leather goods, providing rich, uniform color penetration.
• Paper Staining: Employed in the production of specialty and decorative papers requiring specific color tones.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Ink Formulation: A colorant component in the manufacture of certain inks for industrial marking or printing.

Basic Information

Item	Detail
Product Name	Acid Anthracene Brown Pg
CAS No.	6369-32-0
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Brown PG; Anthracene Brown PG; C.I. Acid Brown 14; Acid Leather Brown PG; Sodium 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, sodium salt (1:2); Acid Anthracene Brown PG
EINECS	228-892-5

Quality Control

Our Acid Anthracene Brown Pg is manufactured under a strict quality management system. Each batch is tested to ensure consistent strength, shade, and purity, meeting the specifications required for industrial dye applications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with every shipment.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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