Description

Chromate(7-), Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Amino]-2-Naphthalenesulfonato(5-)]-, Heptasodium is a complex, high-purity synthetic dye intermediate and analytical reagent. This compound is valued for its precise chromogenic properties and serves as a critical component in the formulation of specialized dyes and colorimetric indicators. It is primarily required by manufacturers in the textile dyeing, analytical chemistry, and specialty chemical synthesis sectors for producing consistent, high-performance colorants.

Application

• Textile Dye Intermediate: A key precursor for synthesizing specific azo dyes used in coloring natural and synthetic fibers.
• Analytical Reagent: Employed in laboratory settings as a colorimetric indicator or complexometric agent for metal ion detection.
• Specialty Ink Formulation: Used in the production of high-performance inks for technical and industrial printing applications.
• Biological Staining: Potential application in the preparation of histological stains for microscopic analysis.
• Research & Development: Serves as a building block in chemical research for developing new chromogenic compounds and materials.
• Photographic Chemicals: Can be utilized in the synthesis of certain light-sensitive compounds for photographic processes.

Basic Information

Item	Detail
Product Name	Chromate(7-), Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Amino]-2-Naphthalenesulfonato(5-)]-, Heptasodium
CAS No.	72765-47-0
Molecular Formula	C44H21N7Na7O23S4
Molecular Weight	Contact for details
Synonyms	Heptasodium Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Amino]-2-Naphthalenesulfonato(5-)]chromate(7-); C.I. Mordant Black 17, sodium salt; Chromate(7-), bis[4-hydroxy-3-[(2-hydroxy-5-nitro-3-sulfophenyl)azo]-6-[(3-sulfophenyl)amino]-2-naphthalenesulfonato(5-)]-, heptasodium; Acid Chrome Blue Black R; Mordant Black 17; Chrome Blue Black R; Eriochrome Blue Black R; Sodium 4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-6-[(3-sulfophenyl)amino]-2-naphthalenesulfonate chromium complex
EINECS	Contact for details

Quality Control

Our Chromate(7-), Bis[4-Hydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Amino]-2-Naphthalenesulfonato(5-)]-, Heptasodium is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing including identification, assay, and impurity profiling to ensure it meets precise specifications. Certificates of Analysis (COA) documenting purity, physical properties, and conformance are available upon request to support your quality assurance protocols.

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 to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Completely soluble

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