Description

Disodium 4-[(4-Amino-2-Hydroxyphenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its primary value lies in its role as a key precursor for synthesizing a range of vibrant and stable dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-quality colorants. Its consistent quality and reliable performance make it a critical component for achieving precise coloration in various applications.

Application

• Primary Intermediate for Dyes & Pigments: Serves as a crucial building block in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, and nylon.
• Textile Industry: Used in the production of dyes for textile fibers, offering good lightfastness and washfastness properties.
• Ink Manufacturing: Employed in the formulation of specialty inks, including those for packaging and security printing applications.
• Leather Coloring: Acts as an intermediate for dyes used in the leather tanning and finishing industry.
• Paper Industry: Utilized in the production of dyes for coloring paper and paper products.
• Research & Development: Serves as a standard or reagent in chemical research for developing new chromophores and studying azo chemistry.
• Biological Staining: Potential use as an intermediate for histological stains in life science research.

Basic Information

Product Name	Disodium 4-[(4-Amino-2-Hydroxyphenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	94236-87-0
Molecular Formula	C16H11N3Na2O9S2
Molecular Weight	499.38 g/mol
Synonyms	4-[(4-Amino-2-hydroxyphenyl)azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt; C.I. 17200; Acid Red 88 (related dye precursor); Disodium 4-amino-2-hydroxy-5-[(5-hydroxy-6-sulfo-2-naphthyl)azo]benzenesulfonate; 2,7-Naphthalenedisulfonic acid, 4-[(4-amino-2-hydroxyphenyl)azo]-5-hydroxy-, disodium salt; Azo dye intermediate 94236-87-0; 5-Hydroxy-4-[(4-amino-2-hydroxyphenyl)azo]naphthalene-2,7-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 4-[(4-Amino-2-Hydroxyphenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our commitment to consistent quality ensures reliable results in your downstream synthesis and manufacturing processes.

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 product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark red to brown 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.