Description

Acid Black 234 is a high-performance, synthetic acid dye belonging to the azo chemical class. This dye is engineered to deliver excellent color fastness and leveling properties, making it a critical component for achieving deep, consistent black shades. It is primarily used by manufacturers in the textile and leather industries for dyeing protein fibers such as wool, silk, and nylon, as well as for leather finishing. Our supply of Acid Black 234 CAS NO 157577-99-6 is backed by stringent quality control to ensure batch-to-batch consistency for industrial applications.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve deep black and navy shades with good wash and light fastness.
• Leather Processing: Used in the dyeing and finishing of leather goods, providing uniform coloration for products like footwear, bags, and upholstery.
• Paper Coloration: Employed for specialty paper dying where acid-fast properties are required.
• Ink Formulation: A colorant component in the manufacture of certain inks, particularly for non-paper substrates.
• Biological Staining: Potential use as a histological stain in laboratory settings, though specific grades must be verified.
• Polyamide Dyeing: Effective for coloring synthetic polyamide materials beyond standard nylon.

Basic Information

Product Name	Acid Black 234
CAS No.	157577-99-6
Molecular Formula	C40H23N7Na4O13S4
Molecular Weight	1085.88 g/mol
Synonyms	Acid Black WAN; C.I. Acid Black 234; Black 234; Acid Leather Black 234; Lanasyn Black S-2G; Telon Black FBL; Nylosan Black F-2GL; Acid Black 2GL; Aminyl Black F-2GL; Supranol Black 2GL
EINECS	Contact for details

Quality Control

Our Acid Black 234 is manufactured under a strict quality management system. Every batch is tested against key parameters including color strength, shade, solubility, and impurity profile to ensure it meets the high standards required for industrial dyeing processes. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee traceability and compliance.

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. The product is light-sensitive and should be stored away from direct light exposure to prevent degradation.

Specification

Item	Specification
Appearance	Black to Dark Brown Powder
Identification (IR)	Conforms to Standard
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to Standard
Fastness Properties	Contact for details

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