Description

Trisodium 5-Amino-4-Hydroxy-3-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its role as a key precursor for synthesizing vibrant and stable acid dyes and food colorants. This compound is essential for manufacturers in the textile, leather, ink, and specialty chemical industries seeking to produce high-quality, color-fast products. Its multi-sulfonated structure ensures excellent solubility and compatibility in aqueous formulations.

Application

• Primary intermediate for the synthesis of acid dyes used in wool, silk, and nylon textile dyeing.
• Key building block in the production of food colorants (FD&C and E-number dyes), subject to stringent purity requirements.
• Precursor for leather dyes, providing deep, uniform coloration.
• Used in the manufacture of inkjet inks and specialty printing inks requiring high color strength.
• Intermediate for paper coloring agents and other industrial colorants.
• Research and development chemical for novel dye-sensitized solar cells (DSSCs) and analytical reagents.

Basic Information

Product Name	Trisodium 5-Amino-4-Hydroxy-3-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	17716-41-5
Molecular Formula	C16H9N3Na3O10S3
Molecular Weight	576.41 g/mol
Synonyms	5-Amino-4-hydroxy-3-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; Acid Red 1 intermediate; C.I. 18050; Trisodium 8-amino-7-hydroxy-1-(4-sulfonatophenyl)azo-3,6-naphthalenedisulfonate; 1-(4-Sulfophenyl)azo-2-amino-8-naphthol-3,6-disulfonic acid trisodium salt; Naphthol AS derivative intermediate; Azo dye intermediate 17716-41-5
EINECS	241-727-5

Quality Control

Our production of Trisodium 5-Amino-4-Hydroxy-3-[(4-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to a strict quality management system, ensuring batch-to-batch consistency for critical applications like food colorant synthesis. Quality is verified through advanced analytical techniques including HPLC for purity and ICP-MS for heavy metal screening. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with every shipment 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). This product is hygroscopic (moisture-sensitive); the original container must be kept sealed to prevent absorption of atmospheric moisture, which can lead to caking and degradation.

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	30.0 - 40.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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