Description

Disodium 4,4'-[[2,4-Dihydroxy-5-(Hydroxymethyl)-1,3-Phenylene]Bis(Azo)]Bisnaphthalene-1-Sulphonate is a high-purity, water-soluble synthetic organic compound belonging to the azo dye class. It serves as a critical colorant and analytical reagent valued for its specific chromophoric properties and stability in aqueous systems. This product is essential for manufacturers and research laboratories in the textile, paper, ink, and biological staining industries seeking consistent and reliable performance.

Application

• Textile Dyeing: Used as a direct or acid dye for coloring natural and synthetic fibers, particularly for achieving specific shades of red, orange, or brown.
• Paper Coloring: Acts as a colorant in the production of specialty papers, including decorative and packaging materials.
• Ink Formulation: Employed in the manufacture of inks for writing, printing, and marking applications.
• Biological Staining: Functions as a histological or cytological stain in microscopy for visualizing cellular structures in laboratory settings.
• Chemical Indicator: Utilized as a pH indicator or colorimetric reagent in analytical chemistry and titration processes.
• Leather Dyeing: Applied in the tanning industry to dye leather goods.
• Research & Development: Serves as a key intermediate or reference standard in organic synthesis and dye chemistry research.

Basic Information

Product Name	Disodium 4,4'-[[2,4-Dihydroxy-5-(Hydroxymethyl)-1,3-Phenylene]Bis(Azo)]Bisnaphthalene-1-Sulphonate
CAS No.	4553-89-3
Molecular Formula	C34H22N4Na2O12S2
Molecular Weight	780.72 g/mol
Synonyms	Acid Orange 61; C.I. 18965; Disodium 4,4'-[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene)bis(azo)]di(naphthalene-1-sulphonate); 1-Naphthalenesulfonic acid, 4,4'-[2,4-dihydroxy-5-(hydroxymethyl)-1,3-phenylene)bis(azo)]di-, disodium salt; Azo Orange; Direct Orange 61; Mordant Orange 1 (related class).
EINECS	Contact for details

Quality Control

Our Disodium 4,4'-[[2,4-Dihydroxy-5-(Hydroxymethyl)-1,3-Phenylene]Bis(Azo)]Bisnaphthalene-1-Sulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing including HPLC for purity, spectrophotometry for color strength, and tests for heavy metals and moisture content to ensure it meets precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment.

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). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Loss on Drying	≤ 5.0%
Sulphated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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