Description

Disodium 3-Hydroxy-4-[[2-Methyl-4-[(o-Tolyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its distinct chromophoric properties. This compound is critical for producing vivid and stable colorants, offering excellent tinctorial strength and compatibility with various substrates. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent color performance.

Application

• Textile Dyeing: A key intermediate for synthesizing acid dyes and direct dyes for coloring nylon, wool, silk, and paper.
• Ink Manufacturing: Used in the formulation of industrial inks, including those for packaging, printing, and writing instruments.
• Pigment Production: Serves as a precursor for creating high-performance organic pigments used in plastics and coatings.
• Leather Finishing: Employed in dye formulations for achieving consistent and durable colors on leather goods.
• Research & Development: Used as a standard or reagent in analytical chemistry and material science research involving colorants.
• Specialty Coatings: Incorporated into coatings where specific color properties and light stability are required.

Basic Information

Product Name	Disodium 3-Hydroxy-4-[[2-Methyl-4-[(o-Tolyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate
CAS No.	6226-80-8
Molecular Formula	C24H16N4Na2O8S2
Molecular Weight	606.51 g/mol
Synonyms	Acid Orange 67; C.I. 14172; Disodium 3-hydroxy-4-[(2-methyl-4-[(2-methylphenyl)azo]phenyl)azo]-2,7-naphthalenedisulfonate; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-((2-methyl-4-((2-methylphenyl)azo)phenyl)azo)-, disodium salt; C.I. Acid Orange 67; o-Tolyl Azo Dye Intermediate; Azo Dye Intermediate 6226-80-8
EINECS	228-314-3

Quality Control

Our production of Disodium 3-Hydroxy-4-[[2-Methyl-4-[(o-Tolyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. All materials undergo rigorous analytical testing, including HPLC for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical specifications is provided with every shipment to support your quality assurance processes.

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 sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated 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.