Description

4,5-Dihydroxy-3-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the synthesis of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textile applications like wool, silk, and nylon.
• Specialty Ink Formulation: Used in the production of high-quality inks for jet printing, packaging, and security printing due to its color strength and solubility.
• Pigment Manufacturing: Acts as a precursor for lake pigments and other colorants used in plastics, coatings, and masterbatches.
• Biological Staining: Potential use in the formulation of histological stains and indicators in laboratory settings.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo dye chemistry and photochemistry.

Basic Information

Item	Detail
Product Name	4,5-Dihydroxy-3-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	6226-96-6
Molecular Formula	C22H14N4Na2O8S2
Molecular Weight	604.48 g/mol
Synonyms	Acid Red 1; C.I. 18050; Naphthol Blue Black 6B; Amido Naphthol Blue Black; Azorubin S; 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-((4-(phenylazo)phenyl)azo)-, disodium salt; 4,5-Dihydroxy-3-(p-(phenylazo)phenylazo)-2,7-naphthalenedisulfonic acid disodium salt
EINECS	228-310-2

Quality Control

Our production of 4,5-Dihydroxy-3-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet precise customer specifications. A Certificate of Analysis (COA) detailing purity, identity, and other critical parameters is provided with each shipment.

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 (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

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

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