Description

2,7-Naphthalenedisulfonic acid, 4-[[2,4-dihydroxy(hydroxymethyl)phenyl]azo]-5-hydroxy-, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid monosodium salt is a high-purity, complex azo dye intermediate. This compound is valued for its precise chemical structure, which is critical for imparting specific color properties and stability in advanced formulations. It is primarily required by manufacturers in the specialty dyes and pigments industry for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for textile coloring, particularly for cotton and cellulose fibers.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments requiring excellent lightfastness and thermal stability for plastics and coatings.
• Functional Dye Synthesis: Serves as a precursor for dyes used in specialized applications such as ink-jet inks, laser dyes, and security printing.
• Research & Development: Employed in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.
• Industrial Colorant Production: Integral to manufacturing processes for colorants used in paper, leather, and other industrial materials.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-[[2,4-dihydroxy(hydroxymethyl)phenyl]azo]-5-hydroxy-, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid monosodium salt
CAS No.	72251-76-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Orange 107; Reactive Orange 107; Monosodium 4-[[2,4-dihydroxy(hydroxymethyl)phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonate; Azo dye intermediate 72251-76-4; Complex azo naphthalene sulfonate; Reactive dye intermediate OR107; 2,7-NDSA coupled azo dye salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for sensitive synthesis processes. Quality is verified through modern analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance systems.

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

Specification

Item	Specification
Appearance	Powder (Color specific to grade)
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in water)	Test and report
Heavy Metals (as Pb)	≤ 20 ppm

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