Description

Disodium 5-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylate is a high-purity, water-soluble azo dye intermediate, also known as a disazo acid dye. This compound is valued for its ability to impart bright, strong colors with good light and wet fastness properties in various substrates. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-performance dyes and pigments. Consistent quality and reliable supply are critical for ensuring batch-to-batch color consistency in final products.

Application

• Textile Dyeing: A key intermediate for synthesizing acid dyes used on protein fibers like wool, silk, and nylon, offering excellent color yield and fastness.
• Leather Coloring: Used in the formulation of dyes for leather finishing, providing vibrant and durable coloration.
• Ink Manufacturing: Serves as a colorant precursor in the production of specialty inks, including those for inks used in packaging and security printing.
• Paper Staining: Employed in the manufacture of dyes for high-grade paper products requiring specific color properties.
• Research & Development: Used as a standard or building block in chemical research for developing new chromophores and functional dyes.
• Biological Staining: Potential application as a histological stain in laboratory settings due to its specific chromogenic structure.

Basic Information

Item	Details
Product Name	Disodium 5-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylate
CAS No.	3442-21-5
Molecular Formula	C27H18N6Na2O8S
Molecular Weight	656.51 g/mol
Synonyms	Acid Red 299; C.I. 18130; Disodium 5-[(4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl)azo]salicylate; 5-[[4-[(7-Amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylic acid disodium salt; 2-Hydroxy-5-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]benzoic acid disodium salt; C.I. Acid Red 299; Azo Rubine S; Lissamine Red 2B
EINECS	Contact for details

Quality Control

Our Disodium 5-[[4-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-1-Naphthyl]Azo]Salicylate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profile. Certificates of Analysis (COA) detailing key parameters are available upon request 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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Water Content (KF)	≤ 5.0%
Ash Content	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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