Description

7-Naphthalenedisulfonic Acid, 5-(Acetylamino)-4-Hydroxy-3-[[4-[[[3-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Amino]-6-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid is a high-purity, complex sulfonated azo dye intermediate essential for synthesizing vibrant and colorfast dyes. Its multi-functional structure provides excellent water solubility and strong affinity for various substrates, making it a critical building block for advanced colorants. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance dyes and pigments with superior stability.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-grade reactive dyes for cotton, wool, and nylon textiles, ensuring brilliant shades and excellent wash-fastness.
• Specialty Ink Manufacturing: Used in formulating inks for digital textile printing and high-resolution inkjet applications, where color purity and stability are paramount.
• Functional Dye Synthesis: Serves as a starting material for creating functional dyes used in biological staining, sensors, and liquid crystal displays (LCDs).
• Research & Development: Employed in chemical R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	7-Naphthalenedisulfonic Acid, 5-(Acetylamino)-4-Hydroxy-3-[[4-[[[3-[[2-(Sulfooxy)Ethyl]Sulfonyl]Phenyl]Amino]-6-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid
CAS No.	13588-33-5
Molecular Formula	C40H30N4O19S5
Molecular Weight	1054.98 g/mol
Synonyms	Acid Black 210; C.I. 300310; Reactive Black 5 Precursor; 5-Acetamido-4-hydroxy-3-((4-((3-((2-sulfooxyethyl)sulfonyl)phenyl)amino)-6-sulfo-1-naphthyl)azo)-1,7-naphthalenedisulfonic acid; Azo Dye Intermediate 13588-33-5; Tetrasodium 5-acetamido-4-hydroxy-3-[7-sulfo-4-[3-(2-sulfooxyethylsulfonyl)anilino]naphthalen-2-yl]azo]naphthalene-1,7-disulfonate; Sulphonated Azo Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high chemical purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after each use to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble

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