Description

3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid is a high-purity, multi-sulfonated azo dye intermediate essential for creating vibrant and wash-fast colors. Its complex molecular structure, featuring multiple sulfonic acid groups, provides excellent water solubility and strong affinity for various substrates, making it a critical building block for advanced colorants. This compound is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for the synthesis of high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key precursor in the synthesis of high-quality reactive dyes for cotton, wool, and nylon, offering excellent color yield and fastness properties.
• Textile Dye Manufacturing: Used in the production of acid dyes and direct dyes for textile applications, providing bright shades and good leveling.
• Inkjet and Printing Inks: Serves as a colorant intermediate for formulating inks that require high solubility, stability, and color intensity.
• Specialty Pigment Synthesis: Employed in the creation of complex organic pigments for plastics, coatings, and artistic materials.
• Biological Staining Reagents: Potential use as an intermediate for developing histological stains and diagnostic dyes in life sciences.
• Research & Development: Utilized in chemical research for studying azo dye chemistry, photochemical properties, and material science applications.

Basic Information

Product Name	3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid
CAS No.	56317-51-2
Molecular Formula	C18H17N3O11S3
Molecular Weight	563.53 g/mol
Synonyms	3-Amino-4-((4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonic acid; Acid Black 210; C.I. 28440; Reactive Black 5 intermediate; 4-Amino-5-hydroxy-6-((4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonic acid; 1-Amino-2-((4-((2-sulfooxyethyl)sulfonyl)phenyl)azo)-6,8-disulfonaphthalene; Azo dye intermediate 56317-51-2
EINECS	Contact for details

Quality Control

Our production of 3-Amino-4-[[4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and titration for functional group analysis, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and 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 purity and performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Moisture (KF Titration)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.5%

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