Description

3-Hydroxy-4-[[4-(Phenylazo)-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its ability to impart vibrant and stable color properties in demanding industrial applications. This compound is essential for manufacturers in the textile dyeing, ink formulation, and specialty chemical synthesis sectors who require consistent quality and reliable supply chains.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, complex azo dyes for textiles, leather, and paper.
• Textile Colorant: Used in the production of dyes for coloring natural and synthetic fibers, offering good wash and light fastness.
• Ink and Pigment Manufacturing: Serves as a precursor for creating specialized pigments and colorants used in printing inks and coatings.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Reagent: Potential use as a staining agent or indicator in specific analytical and biological staining procedures.

Basic Information

Product Name	3-Hydroxy-4-[[4-(Phenylazo)-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt
CAS No.	6226-82-0
Molecular Formula	C26H16N4Na2O7S2
Molecular Weight	606.53 g/mol
Synonyms	Acid Red 299; C.I. 18130; Disodium 3-hydroxy-4-[(E)-[4-[(E)-phenyldiazenyl]naphthalen-1-yl]diazenyl]naphthalene-2,7-disulfonate; 1-Naphthalenesulfonic acid, 3-hydroxy-4-((4-(phenylazo)-1-naphthalenyl)azo)-, disodium salt; Azo Rubine S; Azo Rubine; Mordant Red 19 (related); Contact for additional trade names.
EINECS	228-318-7

Quality Control

Our production of 3-Hydroxy-4-[[4-(Phenylazo)-1-Naphthalenyl]Azo]Naphthalene-2,7-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance standards. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

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); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 30.0%

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