Description

7-Hydroxy-8-[[4-[(3-Phosphonophenyl)Azo]-2-Sulphophenyl]Azo]Naphthalene-1,3-Disulphonic Acid is a high-purity, synthetic organic compound belonging to the azo dye and pigment intermediate class. This specialized chemical is valued for its ability to impart specific color properties and act as a functional intermediate in advanced formulations. It is primarily required by manufacturers in the specialty dyes and pigments, textile processing, and analytical reagent industries for the development of high-performance colorants and chemical sensors.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key building block in the synthesis of high-value, complex azo dyes and pigments, particularly those requiring specific lightfastness and hue properties.
• Textile Colorant Manufacturing: Used in the production of dyes for coloring natural and synthetic fibers, where its chemical structure contributes to color depth and wash-fastness.
• Functional Dye Synthesis: Serves as a precursor for dyes used in specialized applications such as ink-jet printing, optical data storage, and liquid crystal displays (LCDs).
• Analytical Chemistry & Reagents: Employed as a chromogenic reagent or indicator in analytical methods and test kits due to its color-changing properties in response to specific analytes.
• Research & Development: Utilized in chemical R&D for exploring new polymeric colorants, metal-complex dyes, and advanced material coatings.
• Industrial Marker & Tracer Formulations: Incorporated into formulations for non-destructive testing, leak detection, and flow visualization in industrial systems.

Basic Information

Item	Details
Product Name	7-Hydroxy-8-[[4-[(3-Phosphonophenyl)Azo]-2-Sulphophenyl]Azo]Naphthalene-1,3-Disulphonic Acid
CAS No.	93966-72-4
Molecular Formula	C22H15N4O13PS3
Molecular Weight	670.54 g/mol
Synonyms	Acid Black 210; C.I. 30027; 7-Hydroxy-8-({4-[(3-phosphonophenyl)diazenyl]-2-sulfophenyl}diazenyl)naphthalene-1,3-disulfonic acid; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[[4-[(3-phosphonophenyl)azo]-2-sulfophenyl]azo]-; Phosphonated Azo Dye Intermediate; Azo dye intermediate with phosphonic acid group; 93966-72-4
EINECS	Contact for details

Quality Control

Our production of 7-Hydroxy-8-[[4-[(3-Phosphonophenyl)Azo]-2-Sulphophenyl]Azo]Naphthalene-1,3-Disulphonic Acid adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance characteristics. Comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee traceability and compliance with your technical requirements.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which may affect product stability and performance.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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