Description

2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[ 4-hydroxy-3-(phenylazo)-, compd. with α,α',α''- (nitrilotri-2,1-ethanediyl)tris[ω-hydroxypoly (oxy-1,2-ethanediyl)] (1:2) is a high-performance, water-soluble azo dye complex designed for demanding industrial applications. Its unique molecular structure, combining a chromophore with a polymeric surfactant, provides exceptional stability and compatibility in aqueous systems. This product is essential for manufacturers in the textile, paper, and specialty ink industries seeking vibrant, durable coloration with excellent processing characteristics.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, offering good wash and light fastness.
• Paper Coloring: Used in the production of colored paper, paperboard, and specialty packaging materials.
• Ink Formulation: A key component in the manufacture of aqueous-based inks for flexographic and inkjet printing.
• Leather Finishing: Employed in dyeing leather and synthetic leather products to achieve uniform, deep shades.
• Wood Staining: Suitable for water-based stains used in furniture and decorative wood finishing.
• Biological Staining (Research Grade): Potential use as a histological or cytological stain in laboratory settings.
• Polymer Masterbatch: Can be incorporated into polymer concentrates for mass coloration of plastics.

Basic Information

Product Name	2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[ 4-hydroxy-3-(phenylazo)-, compd. with α,α',α''- (nitrilotri-2,1-ethanediyl)tris[ω-hydroxypoly (oxy-1,2-ethanediyl)] (1:2)
CAS No.	72987-48-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 210; Acid Black 210; Azo Black 210; 7,7'-(Carbonyldiimino)bis(4-hydroxy-3-(phenylazo)-2-naphthalenesulfonic acid) compound with ethoxylated triethylenetetramine (1:2); Water-soluble azo dye complex; Polyethoxylated azo dye surfactant complex; Textile dye complex CAS 72987-48-5
EINECS	Contact for details

Quality Control

Our production of 2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[ 4-hydroxy-3-(phenylazo)-, compd. with α,α',α''- (nitrilotri-2,1-ethanediyl)tris[ω-hydroxypoly (oxy-1,2-ethanediyl)] (1:2) adheres to a strict quality management system to ensure batch-to-batch consistency and performance reliability for industrial users. Each lot is tested against key parameters for color strength, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, assay, and physical properties are 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, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is securely sealed after each use to prevent absorption of atmospheric moisture which may affect performance. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (Color Strength)	Min. 95% (vs. standard)
Solubility (in Water)	Complete, clear solution
Moisture Content	Max. 5.0%
Ash Content	Max. 1.0%
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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