Description

Iron, complexes with diazotized 3-aminobenzenesulfonic acid coupled with diazotized 2-amino-5-nitrobenzenesulfonic acid, diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid and 4-[(2-hydroxy-3,5-dinitrophenyl) azo]-1,3-benzenediol, sodium salt is a complex, high-performance coordination compound designed for specialized industrial applications. This product is valued for its unique chromophoric properties and stability, making it a critical component in advanced material formulations. It is primarily sought by manufacturers in the dyes and pigments, specialty coatings, and analytical reagent sectors for its consistent performance and quality.

Application

• Primary use as a complex dye or pigment intermediate for high-grade industrial colorants.
• Key component in the formulation of specialty inks and coatings requiring specific light-fastness and chemical resistance.
• Potential use as a catalyst or catalyst precursor in specific organic synthesis reactions.
• Employed in the development of analytical reagents and indicators for laboratory and diagnostic applications.
• Used in research and development for novel functional materials, including optical and electronic applications.
• Application in the surface treatment of metals and polymers to impart specific functional properties.

Basic Information

Item	Details
Product Name	Iron, complexes with diazotized 3-aminobenzenesulfonic acid coupled with diazotized 2-amino-5-nitrobenzenesulfonic acid, diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid and 4-[(2-hydroxy-3,5-dinitrophenyl) azo]-1,3-benzenediol, sodium salt
CAS No.	115100-55-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Pigment Black 31; Iron complex black pigment; Diazotized iron complex pigment; Sodium salt of iron-azo complex; 3-Aminobenzenesulfonic acid, diazotized, coupled with diazotized 2-amino-5-nitrobenzenesulfonic acid, diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid and 4-[(2-hydroxy-3,5-dinitrophenyl)azo]-1,3-benzenediol, iron complexes; Iron(3+) complex of a specific azo dye; Pigment Black 31 (C.I. 77537)
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is controlled against strict specifications for identity, purity, and performance characteristics relevant to its application as a pigment or specialty chemical. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory needs.

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 moisture absorption, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to standard
Assay (Complex Content)	Min. 95%
Loss on Drying	Max. 2.0%
Ash Content	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility	Contact for details

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