Description

Disodium 5-[(4-Nitro-2-Sulphonatophenyl)Azo]Salicylate is a synthetic azo dye intermediate and colorant known for its vibrant yellow to orange hue. This compound matters for its role in producing high-value, water-soluble dyes and pigments with excellent light and wash fastness properties. Industries such as textile manufacturing, paper coloring, and specialty ink formulation rely on this precise chemical for consistent coloration and performance.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes and direct dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in dyeing and printing processes to achieve bright, stable yellow and orange shades on various fabric types.
• Paper Coloring: Employed in the production of colored paper, cardboard, and specialty packaging materials.
• Ink Formulation: A component in the manufacture of inks for writing, printing, and marking, valued for its solubility and color strength.
• Leather Dyeing: Applied in the tanning industry to color leather goods uniformly.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its chromophoric properties.

Basic Information

Product Name	Disodium 5-[(4-Nitro-2-Sulphonatophenyl)Azo]Salicylate
CAS No.	6470-97-9
Molecular Formula	C13H7N3Na2O8S
Molecular Weight	419.25 g/mol
Synonyms	5-[(4-Nitro-2-sulfophenyl)azo]salicylic acid, disodium salt; Acid Yellow 36 (C.I. 13065); Disodium 5-[(4-nitro-2-sulfonatophenyl)azo]-2-hydroxybenzoate; 2-Hydroxy-5-[(4-nitro-2-sulfophenyl)azo]benzoic acid disodium salt; Azo Yellow Dye Intermediate; Salicylic acid, 5-[(4-nitro-2-sulfophenyl)azo]-, disodium salt
EINECS	229-298-7

Quality Control

Our Disodium 5-[(4-Nitro-2-Sulphonatophenyl)Azo]Salicylate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, impurity profiling, and color strength evaluation, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
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.