Description

Chromate(3-), Bis[2-Hydroxy-3-[(2-Hydroxy-1-Naphthalenyl)Azo]-5-Nitrobenzenesulfonato(3-)]-, Sodium is a high-purity, complex azo dye metal salt, identified by CAS number 85049-67-8. This compound is valued for its strong chromogenic properties and stability, making it a critical component for creating vivid and durable colorants. It is primarily sought by manufacturers in the pigments and dyes, specialty inks, and advanced material coating industries for high-performance applications.

Application

• Pigment and Dye Manufacturing: As a key intermediate for producing high-grade, complex inorganic color pigments (CICPs) and specialty dyes.
• Specialty Inks: Formulation of high-performance inks for security printing, packaging, and industrial marking requiring color fastness.
• Advanced Coatings: Used in the synthesis of colorants for automotive, aerospace, and architectural coatings where UV stability and chemical resistance are paramount.
• Plastics and Polymers: Coloring agent for engineering plastics and synthetic fibers that require high-temperature processing stability.
• Analytical Reagents: Potential use as a chromogenic agent or indicator in specific analytical chemistry and laboratory testing procedures.
• Research & Development: Serves as a sophisticated chemical building block in R&D for novel photonic materials and functional dyes.

Basic Information

Product Name	Chromate(3-), Bis[2-Hydroxy-3-[(2-Hydroxy-1-Naphthalenyl)Azo]-5-Nitrobenzenesulfonato(3-)]-, Sodium
CAS No.	85049-67-8
Molecular Formula	C34H18CrN6Na3O16S2
Molecular Weight	Contact for details
Synonyms	Sodium Bis[2-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]-5-nitrobenzenesulfonato]chromate(III); C.I. Mordant Brown 33; Chromium complex of 2-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]-5-nitrobenzenesulfonic acid; Acid Chrome Brown; Mordant Brown 33; Azo chromium complex dye; Sodium chromium azo dye complex
EINECS	Contact for details

Quality Control

Our production of this complex chromium azo dye adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and metal content analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 2.0%
Chromium Content	To be specified on COA
Sulfated Ash	To be specified on COA
Heavy Metals (as Pb)	Max. 20 ppm
Solubility	Soluble in water, alkaline solutions

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