Description

6-Amino-4-Hydroxy-5-[[4-[[(4-Methyl-2-Sulphophenyl)Amino]Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a high-purity, complex azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing high-performance, colorfast dyes and pigments, particularly in the red to violet spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require precise molecular structures for consistent and vibrant coloration.

Application

• Primary Intermediate for Azo Dyes: Serves as the core building block for the synthesis of acid dyes, direct dyes, and reactive dyes used in textile dyeing and printing.
• Specialty Ink Production: Used in formulating high-quality inks for packaging, security printing, and digital textile printing due to its color properties.
• Pigment Manufacturing: A crucial precursor in the production of organic pigments for plastics, paints, and industrial coatings.
• Research & Development: Employed in chemical R&D for developing new chromophores and studying structure-color relationships.
• Leather Dyeing: Utilized in the formulation of dyes for coloring leather goods, providing good penetration and fastness.
• Paper Coloring: Applied in the manufacture of dyes for specialty and decorative papers.

Basic Information

Item	Detail
Product Name	6-Amino-4-Hydroxy-5-[[4-[[(4-Methyl-2-Sulphophenyl)Amino]Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	94042-72-5
Molecular Formula	C23H19N5O7S2
Molecular Weight	541.56 g/mol
Synonyms	6-Amino-4-hydroxy-5-{[4-({(4-methyl-2-sulfophenyl)amino}sulfonyl)phenyl]diazenyl}naphthalene-2-sulfonic acid; C.I. Acid Red 337; Acid Red 337; Azo dye intermediate 94042-72-5; 5-[[4-[[(4-Methyl-2-sulfophenyl)amino]sulfonyl]phenyl]azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid; 6-Amino-4-hydroxy-5-((4-((4-methyl-2-sulfophenyl)aminosulfonyl)phenyl)azo)-2-naphthalenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 6-Amino-4-Hydroxy-5-[[4-[[(4-Methyl-2-Sulphophenyl)Amino]Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) documenting all critical parameters 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to violet powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%
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.