Description

Disodium 4-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]Naphthalenesulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its molecular structure, featuring multiple sulphonate groups, provides excellent solubility and substantivity, making it a critical component for achieving consistent and high-performance coloration. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries for synthesizing dyes and pigments with superior fastness properties. We supply this intermediate with a focus on batch-to-batch consistency to support reliable and efficient downstream production processes.

Application

• Textile Dye Synthesis: A key intermediate for manufacturing acid dyes and direct dyes used on nylon, wool, silk, and paper.
• Inkjet Ink Formulation: Used in the production of colorants for high-quality digital printing inks, offering good water solubility and color strength.
• Leather Coloring: Employed in the synthesis of dyes for leather finishing, providing deep, even shades.
• Paper Dye Production: A precursor for dyes applied in the coloring of paper and cardboard.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Specialty Pigments: Serves as a building block for creating lake pigments and other performance colorants.

Basic Information

Product Name	Disodium 4-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]Naphthalenesulphonate
CAS No.	85455-46-5
Molecular Formula	C26H18N3Na2O8S2
Molecular Weight	625.54 g/mol
Synonyms	Acid Red 337; C.I. 17200; Disodium 6-Anilino-1-hydroxy-2-naphthaleneazo-3,6-naphthalenedisulfonate; 6-Anilino-1-hydroxy-2-naphthaleneazo-3,6-naphthalenedisulfonic Acid Disodium Salt; 4-[[1-Hydroxy-6-(phenylamino)-3-sulphonato-2-naphthyl]azo]naphthalene-1-sulphonic Acid Disodium Salt; Naphthalenesulfonic acid, 4-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-, disodium salt; C.I. Acid Red 337
EINECS	Contact for details

Quality Control

Our Disodium 4-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]Naphthalenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in sensitive dye synthesis. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and heavy metal content 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 to prevent absorption of atmospheric moisture.

Specification

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

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