Description

Acid Black 1 is a synthetic, water-soluble azo dye belonging to the acid dye class, widely recognized for its deep black shade and good leveling properties. It is a critical component for achieving durable and vibrant coloration on protein-based fibers like wool, silk, and nylon, as well as in leather finishing. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality black hues with excellent fastness characteristics. Its reliable performance makes it a staple in formulations for dyeing and printing applications where color integrity is paramount.

Application

• Primary dyeing of wool, silk, and other natural protein fibers.
• Coloration of nylon and polyamide-based synthetic textiles.
• Leather finishing and dyeing for footwear, apparel, and upholstery.
• Paper staining and specialty paper product manufacturing.
• Ink formulation for specific marking and printing applications.
• Biological staining in microscopy and histology (specific purified grades).
• As a colorant for wood stains and other specialty surface coatings.

Basic Information

Product Name	Acid Black 1
CAS No.	1064-48-8
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 1; Naphthol Blue Black; Amido Black 10B; Acid Blue Black; C.I. 20470; Wool Black; Aniline Blue Black; Acid Leather Black NB
EINECS	213-903-1

Quality Control

Our Acid Black 1 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 dye content, shade, solubility, and fastness properties. Certificates of Analysis (COA) documenting purity, strength, and conformance to agreed specifications are available for every shipment. We support compliance with global regulatory frameworks, including REACH, to facilitate seamless integration into your international supply chain.

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 hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black to dark bluish-black powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 1.0%
Shade & Strength	Within commercial tolerance vs. standard

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