Description

2-Hydroxy-1-(1-Hydroxy-2-Naphthylazo)-6-Nitro-4-Naphthalenesulfonic Acid is a specialized azo dye intermediate and complexing agent known for its distinct chromophoric properties. This compound is critical for synthesizing high-performance dyes and pigments, offering excellent color fastness and complexation stability with metal ions. It is primarily required by manufacturers in the dye and pigment, analytical chemistry, and specialty chemical industries for producing vibrant colors and precise chemical indicators.

Application

• Dye and Pigment Manufacturing: A key intermediate for producing high-quality, light-fast azo dyes and pigments for textiles, inks, and coatings.
• Metal Complex Dyes: Used in the synthesis of pre-metallized dyes, particularly for wool, nylon, and leather, due to its effective metal-chelating structure.
• Analytical Reagent: Serves as a chromogenic agent and complexometric indicator in analytical chemistry for the detection and quantification of specific metal ions.
• Specialty Chemical Synthesis: An important building block in organic synthesis for creating more complex molecules with specific functional properties.
• Research & Development: Utilized in chemical R&D for developing new colorants, sensors, and functional materials.

Basic Information

Product Name	2-Hydroxy-1-(1-Hydroxy-2-Naphthylazo)-6-Nitro-4-Naphthalenesulfonic Acid
CAS No.	25747-08-4
Molecular Formula	C₂₀H₁₃N₃O₇S
Molecular Weight	439.40 g/mol
Synonyms	6-Nitro-1,2-naphthoquinone-1-(2-hydroxy-1-naphthyl)hydrazone-4-sulfonic acid; Acid Chrome Blue K; Mordant Blue 1 intermediate; C.I. 43830; 1-Naphthalenesulfonic acid, 2-hydroxy-1-[(2-hydroxy-1-naphthalenyl)azo]-6-nitro-; 2-Hydroxy-1-[(2-hydroxy-1-naphthyl)azo]-6-nitro-4-naphthalenesulfonic acid; Eriochrome Blue SE
EINECS	Contact for details

Quality Control

Our 2-Hydroxy-1-(1-Hydroxy-2-Naphthylazo)-6-Nitro-4-Naphthalenesulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications for consistent performance in your applications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

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). This material is light-sensitive; prolonged exposure to light should be avoided to maintain stability. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown 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.