Description

7-Naphthalenedisulfonato(4-)]-(2-Hydroxy-5-Nitrophenyl)Azo]- Tetrapotassium is a high-purity, water-soluble azo dye intermediate characterized by its tetrapotassium salt form. This compound matters for its role as a critical precursor in the synthesis of specialized dyes and pigments, offering excellent solubility and consistent reactivity for downstream chemical processes. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for colorant production.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes and direct dyes for textiles, leather, and paper.
• Specialty Pigment Manufacturing: Used in the production of high-performance pigments for inks, coatings, and plastics where color fastness is critical.
• Biological Staining Reagent: Potential use as a precursor for histological stains and indicators in laboratory settings.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo coupling reactions.
• Analytical Chemistry: Can be utilized as a standard or reagent in colorimetric analysis methods.

Basic Information

Product Name	7-Naphthalenedisulfonato(4-)]-(2-Hydroxy-5-Nitrophenyl)Azo]- Tetrapotassium
CAS No.	73038-30-9
Molecular Formula	C₁₆H₈K₄N₂O₁₁S₂
Molecular Weight	634.77 g/mol
Synonyms	7-[(2-Hydroxy-5-nitrophenyl)azo]-1,3-naphthalenedisulfonic acid, tetrapotassium salt; Tetrapotassium 7-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-1,3-disulfonate; C.I. Acid Orange 67; Azo dye intermediate 73038-30-9; 5-Nitro-2-[(1,3-disulfo-7-naphthyl)azo]phenol tetrapotassium salt; 1,3-Naphthalenedisulfonic acid, 7-[(2-hydroxy-5-nitrophenyl)azo]-, tetrapotassium salt
EINECS	Contact for details

Quality Control

Our 7-Naphthalenedisulfonato(4-)]-(2-Hydroxy-5-Nitrophenyl)Azo]- Tetrapotassium is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use in sensitive synthesis applications. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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