Description

3-[(4-Aminophenyl)Azo]-4,5-Dihydroxynaphthalene-2,7-Disulphonic Acid is a high-purity azo dye intermediate and analytical reagent, known for its precise chromophoric properties and reactivity. This compound is critical for ensuring consistent color development and reliable performance in sensitive chemical processes. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for analytical and diagnostic applications. Our supply is characterized by stringent quality control to meet the exacting standards of industrial and research use.

Application

• Dye and Pigment Synthesis: A key intermediate for producing specific azo dyes and colorants.
• Analytical Chemistry: Used as a reagent or indicator in complexometric titrations and colorimetric assays.
• Biological Staining: Potential application in histological staining for microscopy.
• Chemical Research: Serves as a building block for novel organic compounds and materials science research.
• Photographic Chemicals: Can be utilized in specialized photographic development processes.
• Textile Processing: Employed in the development of specialized textile dyes and treatments.

Basic Information

Product Name	3-[(4-Aminophenyl)Azo]-4,5-Dihydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	15475-84-0
Molecular Formula	C16H13N3O8S2
Molecular Weight	439.42 g/mol
Synonyms	4-Aminoazobenzene-2,7-disulfonic acid; 3-[(4-Aminophenyl)diazenyl]-4,5-dihydroxynaphthalene-2,7-disulfonic acid; Acid Black 1 intermediate; C.I. 20470; 4-Aminoazobenzene-2',7'-disulphonic Acid; 1-Naphthalenesulfonic acid, 3-[(4-aminophenyl)azo]-4,5-dihydroxy-2,7-disulfo-; Azoamine Black Intermediate
EINECS	Contact for details

Quality Control

Our 3-[(4-Aminophenyl)Azo]-4,5-Dihydroxynaphthalene-2,7-Disulphonic Acid is produced and tested under a rigorous quality management system. Every batch is analyzed to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and compliance with your project 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 nature, the container must be kept tightly sealed to prevent moisture absorption. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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