Description

6-Hydroxy-5-[(2-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid is a specialized azo dye intermediate known for its distinct chromophoric properties. This compound is valued for its role in synthesizing high-performance pigments and dyes with excellent color fastness and stability. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, durable colors.

Application

This azo compound serves as a critical building block in various colorant manufacturing processes. Its primary and related applications include:

• Dye Intermediate: Key precursor for the synthesis of acid dyes and direct dyes used on wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks and coatings.
• Textile Colorants: Imparts vibrant and stable colors to textile fibers with good wash and light fastness.
• Research & Development: Serves as a standard or reagent in chemical research for developing new chromophores and studying azo chemistry.
• Specialty Inks: Employed in formulating inks for packaging, security printing, and other specialty applications.
• Analytical Chemistry: Can be used as a pH indicator or a complexometric agent in certain analytical methods.

Basic Information

Product Name	6-Hydroxy-5-[(2-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	23222-13-1
Molecular Formula	C₁₆H₁₁N₃O₆S
Molecular Weight	373.34 g/mol
Synonyms	6-Hydroxy-5-[(2-nitrophenyl)azo]-2-naphthalenesulfonic acid; 5-[(2-Nitrophenyl)azo]-6-hydroxy-2-naphthalenesulfonic acid; 2-Naphthalenesulfonic acid, 6-hydroxy-5-[(2-nitrophenyl)azo]-; C.I. 15620; Acid Orange 20 (related dye class); Azo dye intermediate 23222-13-1; 2-Nitroaniline azo derivative of Schaeffer's acid
EINECS	Contact for details

Quality Control

Our production of 6-Hydroxy-5-[(2-Nitrophenyl)Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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 to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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