Description

Disodium 3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate is a high-purity, synthetic organic dye intermediate belonging to the class of azo dyes and sulfonated naphthalene derivatives. This compound is engineered for exceptional color strength and stability, making it a critical component in the production of high-performance pigments and dyes. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent colorants for demanding applications.

Application

• Textile Dyeing: A key intermediate for producing vibrant and wash-fast azo dyes used on cotton, wool, and synthetic fibers.
• Ink Formulation: Used in the synthesis of pigments for printing inks, including those for packaging and commercial printing, due to its color stability.
• Industrial Coatings: Serves as a precursor for pigments in paints and coatings requiring specific color properties and durability.
• Leather Coloring: Employed in the manufacture of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the production of dyes for specialty paper and paperboard products.
• Plastics and Polymers: Acts as a colorant intermediate for coloring various plastic resins and polymer materials.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye synthesis and material science.

Basic Information

Product Name	Disodium 3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate
CAS No.	93882-08-7
Molecular Formula	C37H28N4Na2O11S4
Molecular Weight	894.85 g/mol
Synonyms	Acid Red 337; C.I. 17215; Disodium 5-[(4-methylphenyl)sulfonyl]amino]-3-[[5-[(ethylphenylamino)sulfonyl]-2-phenoxyphenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; 2,7-Naphthalenedisulfonic acid, 5-[[(4-methylphenyl)sulfonyl]amino]-3-[[5-[(ethylphenylamino)sulfonyl]-2-phenoxyphenyl]azo]-4-hydroxy-, disodium salt; Azo dye intermediate 93882-08-7; C.I. Acid Red 337; Sulfonated azo dye intermediate; Reactive dye precursor
EINECS	Contact for details

Quality Control

Our Disodium 3-[[5-[(Ethylphenylamino)Sulphonyl]-2-Phenoxyphenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in sensitive dye and pigment synthesis. A Certificate of Analysis (COA) detailing all relevant parameters is provided with each shipment to guarantee consistency and traceability.

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) and light-sensitive; prolonged exposure to moisture or light should be avoided to maintain stability and performance.

Specification

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

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