Description

Chromate(1-), Bis[3-[(5,8-Dichloro-1-Hydroxy- 2-Naphthalenyl)Azo]-4-Hydroxybenzenesulfonamidato (2-)]-, Sodium is a high-purity, organometallic complex dye and analytical reagent. This compound is valued for its strong chromogenic properties and selective binding characteristics, making it essential for precise colorimetric analysis and specialized dye applications. It is primarily utilized by manufacturers and research laboratories in the analytical chemistry, specialty dye, and advanced materials sectors for developing sensitive detection methods and high-performance colorants.

Application

• Analytical Reagent: Used as a selective chromogenic agent in spectrophotometric and colorimetric assays for metal ion detection.
• Specialty Dye Intermediate: Serves as a key precursor in the synthesis of high-performance, metal-complex dyes for textiles and coatings.
• Biological Staining: Employed in histological and cytological staining procedures for microscopic analysis.
• Indicator Chemistry: Functions as a pH or metal-sensitive indicator in titration and sensor technologies.
• Photographic Sensitizer: Used in specialized photographic and imaging applications.
• Research & Development: A critical tool in chemical research for studying coordination chemistry and azo dye properties.

Basic Information

Product Name	Chromate(1-), Bis[3-[(5,8-Dichloro-1-Hydroxy- 2-Naphthalenyl)Azo]-4-Hydroxybenzenesulfonamidato (2-)]-, Sodium
CAS No.	71550-00-0
Molecular Formula	C34H16Cl4CrN6Na2O10S2
Molecular Weight	~ 1000.6 g/mol (Contact for details)
Synonyms	Sodium Bis[3-[(5,8-Dichloro-1-hydroxy-2-naphthyl)azo]-4-hydroxybenzenesulfonamidato]chromate(1-); C.I. Mordant Black 31; Chromium complex of 3-[(5,8-Dichloro-1-hydroxy-2-naphthyl)azo]-4-hydroxybenzenesulfonic acid, sodium salt; Mordant Black 31; Acid Chrome Dye; Azo-chrome complex dye; Sodium Chromate Azo Dye Complex; 5,8-Dichloro-1-hydroxy-2-naphthylazo hydroxybenzenesulfonamide chromium sodium complex
EINECS	Contact for details

Quality Control

Our production of this specialty chemical adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Each lot is characterized using advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles 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). This material is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); prolonged exposure to air, moisture, or direct light should be avoided to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility	Soluble in water and polar organic solvents

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