Description

5-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1-Sulphonic Acid CAS NO 93658-86-7 is an azo dye intermediate characterized by its distinct molecular structure containing both azo and sulphonic acid functional groups. This compound is valued for its role as a key precursor in the synthesis of specialized dyes and pigments, offering excellent color properties and binding affinity. It is primarily sought by manufacturers in the textile, leather, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of orange, red, and brown azo dyes for textiles and leather.
• Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics, providing good lightfastness and thermal stability.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo compound chemistry.
• Specialty Chemical Synthesis: Acts as an intermediate for creating functional chemicals used in analytical reagents and light-sensitive materials.
• pH Indicators: Potential use in the formulation of pH-sensitive indicators due to its dihydroxyphenyl structure.

Basic Information

Product Name	5-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1-Sulphonic Acid
CAS No.	93658-86-7
Molecular Formula	C₁₆H₁₂N₂O₅S
Molecular Weight	344.34 g/mol
Synonyms	5-[(2,4-Dihydroxyphenyl)diazenyl]naphthalene-1-sulfonic acid; 1-Naphthalenesulfonic acid, 5-[(2,4-dihydroxyphenyl)azo]-; C.I. 18050; Acid Orange 20 intermediate; Azo dye intermediate 93658-86-7; 5-[(2,4-Dihydroxyphenyl)hydrazinylidene]naphthalene-1-sulfonic acid; 1,5-Naphthalenedisulfonic acid derivative (related)
EINECS	Contact for details

Quality Control

Our production of 5-[(2,4-Dihydroxyphenyl)Azo]Naphthalene-1-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR spectroscopy. We provide a detailed Certificate of Analysis (COA) with each shipment, ensuring traceability and compliance with agreed specifications. Our quality system is designed to meet the rigorous demands of industrial dye and pigment 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 material is light-sensitive (store away from light) and may be hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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