Description

Direct Black 126 is a high-performance, synthetic diazo direct dye renowned for its excellent substantivity to cellulosic fibers. This product is engineered to deliver deep, consistent black shades with superior wash and light fastness properties, making it a critical component for demanding textile applications. It is primarily utilized by textile manufacturers and dye houses for dyeing cotton, viscose, and other regenerated fibers, as well as in the paper and leather industries.

Application

• Exhaust dyeing of cotton yarn and fabrics.
• Continuous dyeing and pad-batch processes for cellulosic textiles.
• Dyeing of viscose rayon and other regenerated cellulose fibers.
• Coloration of paper pulp for specialty papers.
• Dyeing of leather to achieve deep black finishes.
• Used in the formulation of ink and toner for specific applications.

Basic Information

Product Name	Direct Black 126
CAS No.	12239-25-7
Molecular Formula	C34H23N9Na4O13S4
Molecular Weight	1021.86 g/mol
Synonyms	Direct Black 126; C.I. Direct Black 126; Direct Black G; Direct Black GN; Direct Black GNB; Direct Black GNF; Direct Black GNL; Direct Black GNS; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(4-[(2-hydroxy-1-naphthalenyl)azo]-1-naphthalenyl]azo]-6-(phenylamino)-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our Direct Black 126 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with each shipment to guarantee it meets your specific application requirements.

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 to Bluish-Black Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Solubility in Water	Conforms
Fastness to Washing	≥ 4-5 (ISO 105-C03)
Fastness to Light	≥ 5 (ISO 105-B02)

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