Description

Disodium 8-Hydroxy-7-[(4-Nitrophenyl)Azo]Naphthalene-1,6-Disulphonate is a synthetic azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for producing high-performance, colorfast dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop vibrant and durable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes and direct dyes, particularly for coloring polyamide fibers like nylon and wool.
• Textile Industry: Used in the production of dyes that offer excellent wash and light fastness properties for fabrics.
• Ink Manufacturing: Employed in the formulation of specialty inks, including those for packaging and security printing applications.
• Pigment Production: Acts as an intermediate for creating organic pigments used in plastics, coatings, and paints.
• Laboratory & Research: Utilized as a standard or reagent in chemical research focused on dye chemistry and chromophore development.
• Specialty Chemical Synthesis: Functions as a starting material for synthesizing more complex dye molecules and functional colorants.

Basic Information

Item	Details
Product Name	Disodium 8-Hydroxy-7-[(4-Nitrophenyl)Azo]Naphthalene-1,6-Disulphonate
CAS No.	84540-31-8
Molecular Formula	C16H9N3Na2O9S2
Molecular Weight	505.36 g/mol
Synonyms	Acid Orange 74 (C.I. 18745); 8-Hydroxy-7-[(4-nitrophenyl)azo]naphthalene-1,6-disulfonic acid disodium salt; C.I. 18745; Disodium 8-hydroxy-7-(4-nitrophenylazo)naphthalene-1,6-disulfonate; 1,6-Naphthalenedisulfonic acid, 8-hydroxy-7-[(4-nitrophenyl)azo]-, disodium salt; Nitrazol Yellow; Azo dye intermediate 84540-31-8
EINECS	Contact for details

Quality Control

Our Disodium 8-Hydroxy-7-[(4-Nitrophenyl)Azo]Naphthalene-1,6-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee consistency and performance.

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 to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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