Description

Disodium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a critical precursor for synthesizing vibrant and stable dyes and pigments, particularly in the red to violet color spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants with excellent fastness properties.

Application

This specialized azo intermediate serves as a key building block in the production of advanced colorants. Its primary and derived applications include:

• Textile Dye Synthesis: A crucial precursor for manufacturing acid dyes and reactive dyes used on nylon, wool, and silk fibers.
• Inkjet Ink Formulation: Used in the synthesis of dyes for high-quality photographic and professional printing inks, offering excellent color gamut and stability.
• Paper Coloring: Employed in the production of dyes for specialty papers, including decorative and security papers.
• Leather Dyeing: Serves as an intermediate for dyes used in the leather tanning and finishing industry.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Liquid Crystal Display (LCD) Color Filters: Can be utilized in the synthesis of dyes for color filters in electronic displays.

Basic Information

Item	Details
Product Name	Disodium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	6300-50-1
Molecular Formula	C22H14N6Na2O8S2
Molecular Weight	624.49 g/mol
Synonyms	7-Amino-4-hydroxy-3-{[4-(4-sulfophenylazo)phenyl]azo}naphthalene-2-sulfonic acid disodium salt; Acid Red 299 (related dye class); C.I. 18130; Disodium 7-amino-4-hydroxy-3-(p-(p-sulfophenylazo)phenylazo)naphthalene-2-sulfonate; Azo dye intermediate RED-V; [4-[[4-(4-Sulfophenylazo)phenyl]azo]-5-hydroxy-7-sulfo-2-naphthyl]azanium disodium salt; Naphthalene sulfonic acid, 7-amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, disodium salt
EINECS	228-577-7

Quality Control

Our production of Disodium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting purity, impurity profile, and physical characteristics are provided as standard, ensuring full traceability and compliance with global supply chain requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to protect from moisture absorption and contamination. Separate from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark red to violet powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Water Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
pH (1% Aqueous Solution)	6.0 - 8.0

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