Description

p-[[1-Hydroxy-6-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-Sulpho-2-Naphthyl]Azo]Benzoic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate with a complex polycyclic structure. This compound is valued for its ability to impart specific color properties and act as a key building block in the synthesis of advanced dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A critical precursor in the synthesis of high-grade reactive dyes for cotton and cellulose fiber dyeing.
• Manufacture of Acid Dyes: Used in the production of acid dyes for coloring wool, silk, and nylon with good wash-fastness.
• Specialty Ink Formulations: Serves as a key component in manufacturing pigments for high-quality printing inks, including inks for packaging and security printing.
• Functional Dye Synthesis: Employed in research and production of functional dyes for non-textile applications, such as in optical sensors or laser dyes.
• Laboratory Reagent: Used as a standard or research chemical in analytical and synthetic chemistry laboratories.

Basic Information

Item	Details
Product Name	p-[[1-Hydroxy-6-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-Sulpho-2-Naphthyl]Azo]Benzoic Acid, Sodium Salt
CAS No.	83221-74-3
Molecular Formula	C34H21N6O12S2Na3
Molecular Weight	894.73 g/mol
Synonyms	Benzoic acid, 4-[[1-hydroxy-6-[[[[5-hydroxy-6-(2-phenylhydrazinylidene)-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-3-sulfo-2-naphthalenyl]hydrazinylidene]-, sodium salt (1:3); Reactive Dye Intermediate; Azo Dye Intermediate CI 18215; Sodium 4-[(1-hydroxy-6-{[(5-hydroxy-6-{2-phenylhydrazinylidene}-7-sulfonato-2-naphthyl)carbamoyl]amino}-3-sulfonato-2-naphthyl)hydrazinylidene]benzoate; Trisodium 4-[(1-hydroxy-6-{[(5-hydroxy-6-{2-phenylhydrazinylidene}-7-sulfo-2-naphthyl)carbamoyl]amino}-3-sulfo-2-naphthyl)hydrazinylidene]benzoate
EINECS	Contact for details

Quality Control

Our p-[[1-Hydroxy-6-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-Sulpho-2-Naphthyl]Azo]Benzoic Acid, Sodium Salt is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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