Description

Acid Black 58 is a synthetic acid dye belonging to the azo dye class, widely recognized for its deep black shade and good fastness properties. Its primary value lies in providing consistent, high-intensity coloration for protein-based fibers, particularly in demanding industrial applications. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and cost-effective black dyeing solutions. Acid Black 58 is valued for its compatibility with standard dyeing processes and its ability to meet specific colorfastness requirements.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve deep black shades.
• Leather Processing: Used in the dyeing of leather goods, providing uniform color penetration and good rub fastness.
• Paper Coloration: Employed for tinting specialty papers, including decorative and packaging materials.
• Ink Formulation: A colorant component in the manufacture of certain inks for industrial marking or printing.
• Biomedical Staining: Potential use as a biological stain in histological applications for microscopic analysis.
• Wood Staining: Applied in the formulation of stains for wood and other natural materials.

Basic Information

Product Name	Acid Black 58
CAS No.	12218-94-9
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 58; C.I. 20225; Acid Leather Black NB; Naphthalene Black 12B; Acid Black NB; Lissamine Black 12B; Amido Black 10B (related); Acid Black 2B; Azo Black
EINECS	Contact for details

Quality Control

Our Acid Black 58 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance tests is provided with every shipment 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 strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Black to dark brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
Shade	Conforms to standard
Solubility in Water	Freely soluble

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