Description

Sodium Diethyl 2-[(2-Amino-8-Hydroxy-6-Sulphonatonaphthyl)Azo]Terephthalate is a specialized azo dye intermediate, known for its precise molecular structure that imparts specific color and functional properties. This compound matters for its role in synthesizing high-performance dyes and pigments with excellent lightfastness and washfastness. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and durable colorants. The product, identified by CAS No. 73309-51-0, is supplied with consistent quality for industrial applications.

Application

• Textile Dyeing: As a key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: For producing high-quality pigments used in printing inks, including textile and packaging inks.
• Functional Dyes: In the development of dyes for specialized applications such as laser marking, optical data storage, or liquid crystal displays (LCDs).
• Research & Development: Serving as a building block for novel chromophores in academic and industrial R&D laboratories.
• Leather Coloring: Used in the formulation of dyes for coloring leather goods.
• Paper Coloring: For the production of dyes used in high-grade paper and specialty paper products.

Basic Information

Item	Details
Product Name	Sodium Diethyl 2-[(2-Amino-8-Hydroxy-6-Sulphonatonaphthyl)Azo]Terephthalate
CAS No.	73309-51-0
Molecular Formula	C22H19N4NaO7S
Molecular Weight	506.46 g/mol
Synonyms	2-[(2-Amino-8-hydroxy-6-sulfo-1-naphthyl)azo]terephthalic acid, diethyl ester, sodium salt; C.I. Azoic Coupling Component; Azo dye intermediate 73309-51-0; Sodium 2-[(2-amino-8-hydroxy-6-sulfonato-1-naphthyl)diazenyl]terephthalate; Diethyl 2-[(2-amino-8-hydroxy-6-sulfonato-1-naphthyl)azo]terephthalate sodium salt
EINECS	Contact for details

Quality Control

Our Sodium Diethyl 2-[(2-Amino-8-Hydroxy-6-Sulphonatonaphthyl)Azo]Terephthalate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment. We are committed to meeting the specifications required for your specific application.

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.

Specification

Item	Specification
Appearance	Dark brown to reddish-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)	Clear to slightly hazy solution

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