Description

Potassium Sodium 7-Hydroxy-8-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate. 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 needed by manufacturers in the textile, ink, and specialty coatings industries seeking consistent and high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for producing high-quality, wash-fast azo dyes for synthetic and natural fibers.
• Ink Formulation: Used in the manufacture of colorants for industrial printing inks, including packaging and security inks.
• Specialty Coatings: Serves as a colorant precursor in coatings for plastics, papers, and other substrates requiring specific hue and stability.
• Research & Development: Employed as a standard or reagent in chemical research for developing new chromophores and functional dyes.
• Analytical Chemistry: Can be utilized as a pH indicator or a staining agent in specific analytical methodologies.
• Pigment Production: Acts as a starting material for the synthesis of lake pigments used in various industrial applications.

Basic Information

Product Name	Potassium Sodium 7-Hydroxy-8-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-1,3-Disulphonate
CAS No.	70321-81-2
Molecular Formula	C22H13KN4Na2O10S2
Molecular Weight	660.64 g/mol
Synonyms	7-Hydroxy-8-[(E)-2-phenyldiazenyl]-1,3-naphthalenedisulfonic acid, dipotassium disodium salt; C.I. 27290; Acid Orange 67; Azo Dye Intermediate 70321-81-2; 8-[(E)-2-Phenyldiazenyl]-7-hydroxynaphthalene-1,3-disulfonic acid potassium sodium salt; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(E)-2-phenyldiazenyl]-, potassium sodium salt; Potassium sodium 7-hydroxy-8-(phenylazo)-1,3-naphthalenedisulfonate
EINECS	Contact for details

Quality Control

Our Potassium Sodium 7-Hydroxy-8-[[4-(Phenylazo)Phenyl]Azo]Naphthalene-1,3-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial synthesis. Certificates of Analysis (COA) detailing specific batch results are available upon request to support your quality assurance protocols.

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 material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed to minimize exposure to atmospheric moisture and light to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to reddish-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)	Clear solution

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