Description

Disodium 3-[(2,4-Diaminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its role as a critical precursor for synthesizing a range of specialized dyes and pigments, offering excellent color strength and stability. This compound is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Dye Synthesis: A key building block for manufacturing acid dyes, direct dyes, and reactive dyes used in textile coloration.
• Leather Dyeing: Used in the formulation of dyes for coloring leather goods, providing good penetration and fastness properties.
• Paper Coloring: Employed in the production of dyes for specialty paper and packaging materials.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromophores and functional dyes.
• Ink Formulation: Can be utilized in the synthesis of colorants for certain types of inks.

Basic Information

Product Name	Disodium 3-[(2,4-Diaminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	67969-79-3
Molecular Formula	C16H12N4Na2O8S2
Molecular Weight	514.40 g/mol
Synonyms	3-[(2,4-Diaminophenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt; C.I. 17200; Acid Brown 4; Disodium 3-[(2,4-diaminophenyl)diazenyl]-5-hydroxynaphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 3-[(2,4-diaminophenyl)azo]-5-hydroxy-, disodium salt; Azoic Diazo Component 4; Dye Intermediate 67969-79-3
EINECS	Contact for details

Quality Control

Our Disodium 3-[(2,4-Diaminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee traceability and consistency for our B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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