Description

Sodium 6-Amino-4-Hydroxy-5-[[2-[(p-Tolyl)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing specialized dyes and pigments with enhanced color fastness and stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloration.
• Key component in the production of specialty inks, including those for packaging and security printing applications.
• Used in the manufacture of functional dyes for applications in electronics and optical data storage.
• Precursor for biological stains and histochemical dyes used in laboratory diagnostics and research.
• Employed in the development of colorants for plastics and polymers to achieve specific hues and properties.
• Research and development of novel photographic and imaging chemicals.

Basic Information

Product Name	Sodium 6-Amino-4-Hydroxy-5-[[2-[(p-Tolyl)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	71873-41-1
Molecular Formula	C23H17N3NaO6S2
Molecular Weight	518.51 g/mol
Synonyms	6-Amino-4-hydroxy-5-[[2-[(4-methylphenyl)sulfonyl]phenyl]azo]-2-naphthalenesulfonic acid sodium salt; Sodium 6-amino-4-hydroxy-5-[(2-[(4-methylphenyl)sulfonyl]phenyl)azo]-2-naphthalenesulfonate; C.I. 18050; Acid Red 180; Azo dye intermediate 71873-41-1; 5-[[2-[(4-Methylphenyl)sulfonyl]phenyl]azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of Sodium 6-Amino-4-Hydroxy-5-[[2-[(p-Tolyl)Sulphonyl]Phenyl]Azo]Naphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry standards. A detailed Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and specification compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed 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%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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