Description

2-Naphthalenesulfonic Acid, 6-Amino-5-((2-Hydroxy-4-Nitrophenyl)Azo)- is a specialized azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing high-performance dyes and pigments, particularly those requiring specific color fastness and stability properties. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Leather Dyeing: Used in the production of dyes for coloring leather goods, providing good penetration and color richness.
• Specialty Inks: A precursor for pigments used in inks requiring specific shades and chemical resistance.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo coupling reactions.
• Paper Coloring: Potential use in the manufacture of dyes for specialty paper products.

Basic Information

Product Name	2-Naphthalenesulfonic Acid, 6-Amino-5-((2-Hydroxy-4-Nitrophenyl)Azo)-
CAS No.	86-31-7
Molecular Formula	C₁₆H₁₂N₄O₆S
Molecular Weight	388.36 g/mol
Synonyms	6-Amino-5-((2-hydroxy-4-nitrophenyl)azo)-2-naphthalenesulfonic acid; Acid Orange 20; C.I. 14600; 2-Naphthalenesulfonic acid, 6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]-; Tropaeolin O; Orange IV; 5-[(2-Hydroxy-4-nitrophenyl)azo]-6-amino-2-naphthalenesulfonic acid
EINECS	201-660-7

Quality Control

Our production of 2-Naphthalenesulfonic Acid, 6-Amino-5-((2-Hydroxy-4-Nitrophenyl)Azo)- adheres to stringent quality protocols to ensure batch-to-batch consistency and purity suitable for industrial synthesis. Each lot is analyzed against rigorous in-house specifications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (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.