Description

4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, complex azo dye intermediate known for its distinct chromophoric properties and strong sulfonic acid groups. This compound is critical for synthesizing specialized dyes and pigments that require excellent lightfastness and solubility in aqueous systems. It is primarily sought by manufacturers in the textile dyeing, analytical chemistry, and specialty chemical synthesis sectors for producing vibrant, stable colorants and as a reagent in colorimetric detection methods.

Application

• Textile Dye Intermediate: A key precursor for synthesizing acid dyes and direct dyes for nylon, wool, and silk, offering good wash and light fastness.
• Specialty Pigment Manufacturing: Used in the production of high-performance pigments for inks, coatings, and plastics where specific color shades and stability are required.
• Analytical Reagent: Employed in laboratory settings as a complexometric indicator or a chromogenic agent in spectrophotometric analysis and metal ion detection.
• Biological Staining: Potential use in histological stains for microscopy due to its ability to form complexes with specific tissue components.
• Research & Development: Serves as a building block in chemical research for developing new functional dyes, sensors, and photoactive materials.
• Paper Coloring: Can be utilized in the manufacture of colored papers and paper products requiring specific dye characteristics.

Basic Information

Product Name	4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	20650-52-6
Molecular Formula	C22H12N8O16S2
Molecular Weight	708.50 g/mol
Synonyms	Acid Black 107; C.I. 20650; 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3,6-bis[(2-hydroxy-3,5-dinitrophenyl)azo]-; C.I. Acid Black 107; Acid Black 107 (C.I. 20650); 4,5-Dihydroxy-3,6-bis[(2-hydroxy-3,5-dinitrophenyl)azo]-2,7-naphthalenedisulfonic acid; 3,6-Bis[(2-hydroxy-3,5-dinitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analysis including HPLC for purity, spectrophotometry for color strength, and elemental analysis. Certificates of Analysis (COA) detailing all specifications are 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). Keep away from strong acids and organic solvents. Due to its light-sensitive nature, containers should be opaque or stored in darkness. Ensure the storage area is free from excessive heat and ignition sources.

Specification

Item	Specification
Appearance	Dark Brown to Black Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Color Strength	95 - 105% (vs. Standard)
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 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.