Description

Acid Black 168 is a high-performance, synthetic azo dye widely used for its deep, durable black shades and excellent fastness properties. This product is essential for achieving consistent, high-quality coloration in demanding industrial applications where color stability is critical. It is primarily utilized by manufacturers in the textile, leather, and paper industries for dyeing and printing natural and synthetic fibers.

Application

• Dyeing of wool, silk, and nylon fibers to produce deep black shades.
• Leather finishing for upholstery, automotive interiors, and fashion accessories.
• Paper coloration for specialty papers and packaging materials.
• Ink formulation for textile printing and marking applications.
• Dyeing of blended fabrics containing polyamide or protein-based fibers.

Basic Information

Product Name	Acid Black 168
CAS No.	12238-87-8
Molecular Formula	C32H21N5Na2O8S2
Molecular Weight	729.64 g/mol
Synonyms	Acid Black WAN; C.I. Acid Black 168; Acid Leather Black NB; Acid Black NB; Acid Black NT; Acid Black 168 (C.I.); Sodium 4-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-3-hydroxynaphthalene-2,7-disulphonate; 2,7-Naphthalenedisulfonic acid, 4-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-3-hydroxy-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Black 168 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. Certificates of Analysis (COA) documenting purity, heavy metal content, and other relevant specifications are available upon request 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.

Specification

Item	Specification
Appearance	Black powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	To be specified per grade

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