Description

Dipotassium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate. This compound is valued for its role as a key precursor in the synthesis of vibrant and stable colorants. It is primarily needed by manufacturers in the dyes and pigments, textile, and specialty chemical industries seeking reliable intermediates for high-performance products.

Application

• Primary intermediate for the synthesis of acid dyes and direct dyes used in textile coloration.
• Key precursor in the production of pigments and lakes for inks, coatings, and plastics.
• Used in research and development of novel azo-based colorants with specific lightfastness and solubility properties.
• Potential intermediate for biological stains and histological dyes in life sciences.
• Employed in the manufacture of specialty dyes for paper, leather, and food contact materials (subject to regulatory approval).
• Starting material for creating functional dyes used in sensors or optical applications.

Basic Information

Product Name	Dipotassium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate
CAS No.	94021-37-1
Molecular Formula	C₁₆H₁₀K₂N₂O₈S₂
Molecular Weight	500.59 g/mol
Synonyms	7-Hydroxy-8-(phenylazo)naphthalene-1,3-disulfonic acid dipotassium salt; C.I. 18050; Acid Yellow 36 (Dipotassium Salt); Dipotassium 8-(phenylazo)-7-hydroxynaphthalene-1,3-disulfonate; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-(phenylazo)-, dipotassium salt; Azo dye intermediate K; Phenylazonaphthol disulfonate dipotassium salt
EINECS	Contact for details

Quality Control

Our production of Dipotassium 7-Hydroxy-8-(Phenylazo)Naphthalene-1,3-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistency, purity, and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is available upon request.

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). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, minimize exposure during handling.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%
Solubility (in Water)	Freely soluble

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