Description

Disodium 4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(o-Tolyl)Azo]Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate known for its complex molecular structure and specific chromophoric properties. This compound matters as a critical building block for producing specialized dyes and pigments, offering precise color characteristics and stability for demanding applications. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking consistent quality and reliable supply for their production processes.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-performance azo dyes used on natural and synthetic fibers.
• Ink Formulation: In the production of specialized printing inks, including those for packaging and security applications.
• Pigment Manufacturing: Serves as a precursor for creating organic pigments with specific shades and lightfastness properties.
• Research & Development: Used in chemical research for developing new colorants and studying azo compound chemistry.
• Specialty Coatings: Incorporated into formulations for coatings requiring specific, durable color properties.
• Analytical Chemistry: Potential use as a reagent or standard in chromatographic and spectroscopic analysis.

Basic Information

Product Name	Disodium 4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(o-Tolyl)Azo]Naphthalene-2-Sulphonate
CAS No.	69205-10-3
Molecular Formula	C41H28N6Na2O11S2
Molecular Weight	882.79 g/mol
Synonyms	Acid Red 337; C.I. 17200; Disodium 6-[(2-methoxyphenyl)azo]-5-hydroxy-7-[[3-[(2-methylphenyl)azo]-4-sulfo-2-hydroxynaphthalen-1-yl]carbamoylamino]naphthalene-2-sulfonate; 2-Naphthalenesulfonic acid, 7-[[[[5-hydroxy-6-[(2-methoxyphenyl)azo]-7-sulfo-2-naphthalenyl]amino]carbonyl]amino]-4-hydroxy-3-[(2-methylphenyl)azo]-, disodium salt; Azo dye intermediate 69205-10-3; C.I. Acid Red 337; Benzenesulfonic acid derivative dye intermediate
EINECS	Contact for details

Quality Control

Our Disodium 4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(o-Tolyl)Azo]Naphthalene-2-Sulphonate is manufactured under strict quality management systems. The product undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) detailing batch-specific results are provided with every shipment to guarantee traceability and quality assurance for your production 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 each use to prevent absorption of atmospheric moisture, which can affect product quality and performance.

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
Solubility (1% in Water)	Complete, clear solution

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