Description

5-[[4-[[8-Amino-1-Hydroxy-7-(Phenylazo)-3,5-Bis(Sodiosulfo)-2-Naphthalenyl]Azo]-1-Naphthalenyl]Azo]-2-Hydroxybenzoic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent chromophoric properties, making it a critical precursor for synthesizing high-value dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, stable colors.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-grade reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Colorant Production: Manufacture of direct and acid dyes for wool, silk, and nylon fabrics, offering good wash and light fastness.
• Inkjet and Printing Ink Formulation: Used in the production of specialized inks for digital textile printing and high-quality paper printing.
• Leather Dyeing: Intermediate for dyes applied in the leather tanning and finishing industry.
• Paper Coloring: Synthesis of dyes for specialty paper and packaging materials.
• Research & Development: Serves as a reference standard and starting material in chemical research for novel chromophores and functional dyes.

Basic Information

Product Name	5-[[4-[[8-Amino-1-Hydroxy-7-(Phenylazo)-3,5-Bis(Sodiosulfo)-2-Naphthalenyl]Azo]-1-Naphthalenyl]Azo]-2-Hydroxybenzoic Acid Sodium Salt
CAS No.	6451-07-6
Molecular Formula	C39H24N8Na3O11S2
Molecular Weight	960.80 g/mol
Synonyms	Acid Red 299; C.I. 18130; Sodium 5-[(4-[(8-amino-1-hydroxy-7-(phenylazo)-3,5-disulphonato-2-naphthyl)azo]-1-naphthyl)azo]salicylate; Benzoic acid, 5-[[4-[[8-amino-1-hydroxy-7-(2-phenylhydrazinylidene)-3,5-disulfo-2-naphthalenyl]hydrazinylidene]-1-naphthalenyl]hydrazinylidene]-2-hydroxy-, sodium salt (1:?); 2-Hydroxy-5-[(4-[(8-amino-1-hydroxy-7-phenylazo-3,5-disulfo-2-naphthyl)azo]-1-naphthyl)azo]benzoic acid sodium salt
EINECS	229-247-1

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity for optimal downstream performance. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify critical parameters including assay, impurity profile, and color strength. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance and regulatory compliance 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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