Description

5-Hydroxy-4-[[4-(Phenylamino)-5-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its primary value lies in its ability to form strong covalent bonds with substrates, resulting in excellent lightfastness and washfastness properties. This compound is a critical raw material for manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance dyes and pigments.

Application

• Primary Intermediate for Azo Dyes: Key building block in the synthesis of acid dyes, direct dyes, and reactive dyes for textile fibers like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, coatings, and plastics, offering excellent color strength.
• Specialty Chemical Synthesis: Serves as a precursor for research and development of novel chromophores and functional dyes with specific optical properties.
• Biological Staining: Potential use in the formulation of histological stains and indicators in analytical chemistry due to its specific chromogenic structure.
• Functional Material Development: Investigated for applications in advanced materials, including light-harvesting systems and sensors.

Basic Information

Product Name	5-Hydroxy-4-[[4-(Phenylamino)-5-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt
CAS No.	10190-75-7
Molecular Formula	C26H17N3O8S2Na2
Molecular Weight	609.53 g/mol
Synonyms	Acid Red 299; C.I. 18130; 1-Naphthalenesulfonic acid, 5-hydroxy-4-((4-(phenylamino)-5-sulfo-1-naphthalenyl)azo)-, disodium salt; Disodium 5-hydroxy-4-[(4-phenylamino-5-sulphonato-1-naphthyl)azo]naphthalene-1-sulphonate; Azo Dye Intermediate 10190-75-7; 4-[(4-Anilino-5-sulfo-1-naphthyl)azo]-5-hydroxy-1-naphthalenesulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of 5-Hydroxy-4-[[4-(Phenylamino)-5-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request to support your quality assurance protocols.

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). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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