Description

Acid Black 52 is a synthetic, water-soluble acid dye belonging to the azo chemical class. It is valued for its strong affinity to protein fibers like wool, silk, and nylon, providing deep, level shades with good fastness properties. This dye is essential for manufacturers in the textile and leather industries seeking reliable and consistent coloration for their products. Its formulation is designed to meet the rigorous demands of industrial dyeing and printing processes.

Application

• Primary dyeing of wool, silk, and nylon textiles.
• Printing applications on protein-based fibers and polyamide materials.
• Coloration of leather goods, including footwear, apparel, and accessories.
• Dyeing of blended fabrics containing wool or nylon components.
• Used in the production of carpets and rugs for residential and commercial use.
• Specialized applications in the dyeing of feathers and furs.
• As a colorant for certain types of paper and specialty inks.

Basic Information

Product Name	Acid Black 52
CAS No.	5610-64-0
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black WAN; C.I. Acid Black 52; Acid Leather Black NB; Naphthalene Black 12B; Acid Black NB; Acid Black 2B; Acid Black B; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[(4-[(2-hydroxy-1-naphthalenyl)azo]phenyl)azo]-, disodium salt
EINECS	227-027-5

Quality Control

Our Acid Black 52 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee the product meets your technical specifications and quality expectations.

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 maintain stability.

Specification

Item	Specification
Appearance	Black powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 30.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Contact for details

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