Description

2-Naphthalenesulfonic Acid, 6-Amino-5-[[4-[(4-Chlorobenzoyl) Amino]-2-Sulfophenyl]Azo]-4-Hydroxy-, Disodium Salt is a high-purity, water-soluble azo dye intermediate characterized by its complex sulfonated aromatic structure. This compound is essential for synthesizing specialized dyes and pigments that require excellent lightfastness and solubility properties. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance acid dyes and direct dyes for textiles like nylon, silk, and wool.
• Specialty Ink Formulations: Used in the production of inks for jet printing, packaging, and security applications where color consistency and stability are critical.
• Pigment Manufacturing: Acts as a functional intermediate in the creation of lake pigments and other colorants for plastics and coatings.
• Research & Development: Employed in chemical research for developing new chromophores and studying structure-property relationships in dye chemistry.
• Analytical Reagent: Can be utilized as a standard or reagent in analytical methods for dye identification and quality control.

Basic Information

Product Name	2-Naphthalenesulfonic Acid, 6-Amino-5-[[4-[(4-Chlorobenzoyl) Amino]-2-Sulfophenyl]Azo]-4-Hydroxy-, Disodium Salt
CAS No.	70815-10-0
Molecular Formula	C23H15ClN4Na2O8S2
Molecular Weight	628.95 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 6-amino-5-{[4-[(4-chlorobenzoyl)amino]-2-sulfophenyl]azo}-4-hydroxy-2-naphthalenesulfonate; 6-Amino-4-hydroxy-5-{[4-[(4-chlorobenzoyl)amino]-2-sulfophenyl]azo}-2-naphthalenesulfonic acid disodium salt; 2-Naphthalenesulfonic acid, 6-amino-5-((4-((4-chlorobenzoyl)amino)-2-sulfophenyl)azo)-4-hydroxy-, disodium salt; C.I. Acid Red 337; Azo dye intermediate 70815-10-0
EINECS	Contact for details

Quality Control

Our 2-Naphthalenesulfonic Acid, 6-Amino-5-[[4-[(4-Chlorobenzoyl) Amino]-2-Sulfophenyl]Azo]-4-Hydroxy-, Disodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, documenting key parameters such as assay, impurity profile, and physical properties. Our quality commitment ensures the material meets the stringent requirements of industrial dye synthesis.

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). This product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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